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GENERAL: References to articles on general properties of ⁶He published since the previous review (1988AJ01) are grouped into categories and isted, along with brief descriptions of each item, in the General Tables for ⁶Li located on our website at (nucldata.tunl.duke.edu/NuclData/General_Tables/6li.shtml).

See also 3 [Electromagnetic Transitions in A = 5-7] (in PDF or PS) and 6.4 [Table of Energy Levels] (in PDF or PS).

Ground State Properties:

The interaction nuclear radius of ⁶Li is 2.09 ± 0.02 fm (1985TA18). These authors have also derived nuclear matter, charge and neutron r.m.s. radii.

Quadrupole moment: The tiny quadrupole moment of ⁶Li poses a difficult task for theoretical calculations. Except for a phenomenological (1985ME02), a microscopic cluster (1986ME13), and a Greens-Function Monte-Carlo (1997PU03) calculation, the models fail even to predict the sign. See the discussion of three-body models in (1993SC30). In (1991UN02), this failure of the three-body models is blamed on the missing antisymmetrization of the valence nucleons with the nucleons in the alpha-core. Another microscopic cluster calculation (1992CS04) considers the findings of (1986ME13) to be due to a fortuitous choice of the model space.

Asymptotic D/S ratio¹: The ratio of the D- and S-state asymptotic normalization constants, referred to in the literature as η, has been used widely to quantify the properties of the D-state wave function. There is general agreement in the A = 2 - 4 systems between theoretical calculations and empirical determinations of the normalization constants. See (1988WE20, 1990EI01, 1990LE24). The S-state α + d normalization constant for ⁶Li appears to be well determined (1993BL09, 1999GE02), but both the magnitude and sign of η are uncertain.

In a two-body α + d model it was found (1984NI01) that in order to reproduce the experimental quadrupole moment Q, the wave functions must have η < 0. However, three-body (α + n + p) models consistently result in predictions of η > 0 (1990LE24, 1995KU08). Recent microscopic six-body calculations using realistic NN potentials predict η = -0.07 (1996FO04).

The asymptotic D/S ratio has been probed empirically by studying scattering processes, transfer reactions, and ⁶Li breakup. These determinations usually rely on an underlying assumption as to the scattering or reaction mechanism. The S- and D-state asymptotic normalization constants were determined in a study of d-α scattering (1978BO43) from which η was found to be +0.005 ± 0.014. Several pol. ⁶Li + ⁵⁸Ni elastic scattering studies (1984NI01, 1995DE06, 1995RU14) have described polarization observables with η ≈ -0.01, while an investigation of the breakup of pol. ⁶Li on ¹H suggests η > 0 (1992PU03). A study of the ⁶Li(d, α)⁴He reaction (1990SA47) found that η should lie in the range -0.010 to -0.015. Recently, a phase-shift analysis of pol. ⁶Li + ⁴He scattering determined η = -0.025 ± 0.006 ± 0.010 (1999GE02) while an analysis of (pol. ⁶Li, d) transfer reactions resulted in a near zero value of η = +0.0003 ± 0.0009 (1998VE03).

Based on these theoretical and empirical results, we conclude that both the magnitude and sign of η for the ⁶Li → α + d wave function are not well determined. See also (1998VE03, 1999GE02).

Isotopic abundance: (7.5 ± 0.2)% (1984DE53). See also (1987LA1J, 1988LA1C).

For estimates of the parity-violating α-decay width of ⁶Li*(3.56) [0⁺; T = 1] see (1983RO12, 1984BU01, 1986BU07).

1. 1H(6Li, 6Li)1H

Differential cross sections were measured at E = 0.7 GeV/A by (2000DOZY, 2001EG02). Matter distribution radii and halo features of ⁶Li*(3.56) were deduced.

2. 2H(α, π0)6Li

Qm = -133.503

Measurements of cross sections at E_α = 418, 420 MeV are reported by (2000AN15, 2000AN31). Halo features of ⁶Li* were deduced.

3. (a) 3He(3H, γ)6Li	Qm = 15.7947
(b) 3He(3H, n)5Li	Qm = 10.41	Eb = 15.80
(c) 3He(3H, d)4He	Qm = 14.32037
(d) 3He(3H, 3H)3He

In the previous review (1988AJ01), information on radiative capture of ³H on ³He was summarized as follows: "Capture γ-rays (reaction (a)) to the first three states of ⁶Li [γ₀, γ₁, γ₂] have been observed for E(³He) = 0.5 to 25.8 MeV, while the yields of γ₃ and γ₄ have been measured for E(³He) = 12.6 to 25.8 MeV. The γ₂ excitation function does not show resonance structure. However, the γ₀, γ₁, γ₃ and γ₄ yields do show broad maxima at E(³He) = 5.0 ± 0.4 [γ₀, γ₁], 20.6 ± 0.4 [γ₁], ≈ 21 [γ₃] and 21.8 ± 0.8 [γ₄] MeV. The magnitude of the ground-state-capture cross section is well accounted for by a direct-capture model; that for the γ₁ capture indicates a non-direct contribution above E(³He) = 10 MeV, interpreted as a resonance due to a state with E_x = 25 ± 1 MeV, Γ_cm = 4 MeV, T = 1 (because the transition is E1, to a T = 0 final state) [the E1 radiative width |M|² ≥ 5.2/(2J + 1) W.u.], J^π = (2, 3, 4)^-, α + p + n parentage. The γ₄ resonance is interpreted as being due to a broad state at E_x = 26.6 MeV with T = 0. J^π = 3^- is consistent with the measured angular distribution. The ground and first excited state reduced widths for ³He + t parentage, θ₀² = 0.8 ± 0.2 and θ₁² = 0.6 ± 0.3: see (1974AJ01). See also (1985MOZZ, 1986MOZQ, 1987MO1I)."

Since the previous review (1988AJ01), a new resonance analysis (1988MO1I, 1990HE20, 1990MO10, 1992HE1E) has been applied to the ³He + ³H elastic scattering in odd parity states and to the ³He(³H, γ) data. This analysis explains the shape of the capture cross sections and angular distributions in terms of very wide overlapping resonances. See 6.5 (in PDF or PS). These correspond to ⁶Li states at E_x = 17.985 ± 0.025 MeV, Γ_cm = 3.012 ± 0.007 MeV, J^π = 2^-; E_x = 24.779 ± 0.054 MeV, Γ_cm = 6.754 ± 0.110 MeV, J^π = 3^-; E_x = 24.890 ± 0.055 MeV, Γ_cm = 5.316 ± 0.112 MeV, J^π = 4^-; E_x = 26.590 ± 0.065 MeV, Γ_cm = 8.684 ± 0.125 MeV, J^π = 2^- (all with S = 1, T = 1). The analysis is compatible with an almost pure ³He - ³H cluster structure of the negative parity unbound ⁶Li states with S = 1, T = 1. These results are supported by calculations described in (1995OH03) which utilize a complex-scaled ³He + t resonating group method to calculate the energies and widths of the ⁶Li ³He + t states. Note, however, that the calculated scattering phase shifts rise only gradually with energy and stay well below 90°. Consequently the stated precision on the extracted level parameters is a point of controversy between the authors of (1990MO10, 1990HE20) and one of the authors [H.M.H.] of this review. The radiative capture reaction as a source of ⁶Li production in Big Bang nucleosynthesis is discussed in (1990FU1H, 1990MA1O, 1997NO04). See also (1995DU12).

The angular distribution and polarization of the neutrons in reaction (b) have been measured at E(³He) = 2.70 and 3.55 MeV. The excitation function for E(³He) = 0.7 to 3.8 MeV decreases monotonically with energy. The excitation function for n₀ has been measured for E(³He) = 2 to 6 MeV and for E(³He) = 14 to 26 MeV; evidence for a broad structure at E(³He) = 20.5 ± 0.8 MeV is reported [⁶Li*(26.1)]: see (1979AJ01).

Angular distributions of deuterons (reaction (c)) have been measured for E_t = 1.04 to 3.27 MeV and at E(³He) = 0.29 to 32 MeV. Polarization measurements are reported for E_t = 9.02 to 17.27 MeV [see (1979AJ01)], as well as at E(pol. ³He) = 18.0 and 33.0 MeV (1986RA1C). See also (1986KO1K) and (1985CA41). A microscopic calculation for reaction (c) and its inverse with special emphasis on isospin breaking in the analyzing power is described in (1990BR09). See also the calculations of (1990BLZW, 1993DU02, 1993FI06).

Elastic scattering (reaction (d)) angular distributions were measured at E(³He) = 5.00 to 32.3 MeV and excitation functions were reported for E(³He) = 4.3 to 33.4 MeV see (1979AJ01). At the lower energies the elastic yield is structureless and decreases monotonically with energy. Polarization measurements were reported for E_t = 9.02 to 33.3 MeV. A strong change occurs in the analyzing power angular distributions at E_t = 15 MeV. See (1988AJ01) for a description of earlier analyses of these data. More recently a new resonance analysis (1990HE20, 1990MO10) of these same data along with ³He(³H, γ) data led to the ⁶Li S = 1, T = 1 states discussed above under reaction 3(a). See 6.5 (in PDF or PS). A coupled-channels variational model calculation of the ³He(total) cross section for E_t = 9 MeV has been reported by (2001TH12). For other channels see (1984AJ01). See also (1984KR1B). For thermonuclear reaction rates see (1988CA26).

4. (a) 3H(α, n)6Li	Qm = -4.7829
(b) 3H(α, αd)n	Qm = -6.25725
(c) 3H(α, t3He)n	Qm = -20.57762

⁶Li*(0, 2.19) have been populated with reaction (a): see (1974AJ01). See also ⁷Li (1983CO1E) and (1983FU11). Cross sections for E_α < 20 MeV were calculated with a resonating group method by (1991FU02). A kinematically complete experiment on reaction (b) at E_α = 67.2 MeV is described in (2000GO35). ⁶Li excited states at E_x = 14.5 and 16.0 MeV with widths ≈ 1 MeV are reported. In a similar experiment (1999GO36) at E_α = 67.2 MeV on reaction (c) a ⁶Li level at E_x ≈ 20 - 21 MeV was reported based on the energy of the final state between ³H and ³He.

5. 3He(3He, π+)6Li

Qm = -123.7941

Differential cross sections were measured for the transitions to ⁶Li*(0, 2.19) for E(³He) = 350, 420, 500 and 600 MeV (1983LE26). See also (1984AJ01), (1983BR31, 1983JA13) and (1984GE05). Analyses of data for E(³He) = 295 - 810 MeV and microscopic reaction model calculations are reported by (1991HA22). See also the calculations of (1999VO01).

6. 4He(d, γ)6Li

Qm = 1.4743

The previous review (1988AJ01) summarized the information on this reaction as follows: "No resonance has been observed corresponding to formation of ⁶Li*(3.56) [0⁺; T = 1]: the parity-forbidden Γ_α ≤ 6 × 10^-7 eV (1984RO04)". See also (1984BU01, 1986BU07).

"The cross section for the capture cross section has been measured for E_α = 3 to 25 MeV by detecting the recoiling ⁶Li ions: the direct capture is overwhelmingly E2 with a small E1 contribution. The spectroscopic overlap between the ⁶Li_g.s. and α + d is 0.85 ± 0.04: see (1984AJ01). See also (1982KI11), (1985CA41, 1986LA22, 1986LA27) and theoretical work presented in (1984AK01, 1985AK1B, 1986AK1C, 1986BA1R)." Since the previous review (1988AJ01), measurements of the cross section at energies E_α ≈ 2 MeV corresponding to the 3⁺ resonance at E_x = 2.186 MeV in ⁶Li have been reported (1994MO17). Values extracted for the total width Γ and the radiative width Γ_γ confirm the adopted value (1988AJ01). An experimental search for the reaction at E_cm ≈ 53 keV (1996CE02) gave an upper limit for the S factor of 2 × 20^-7 MeV · b at the 90% confidence level. Implications for Big Bang nucleosynthesis of ⁶Li are discussed. Thermonuclear reaction rates for this reaction calculated from evaluated data are presented in the compilation (1999AN35).

A considerable amount of theoretical work has been devoted to this reaction - much of it related to its importance in astrophysics. A list of references with brief descriptions is provided in 6.6 (in PDF or PS).

7. (a) 4He(d, np)4He	Qm = -2.224	Eb = 1.475
(b) 4He(d, t)3He	Qm = -14.320

Reaction (a) has been studied to E_α = 165 MeV and to E_d = 21.0 MeV: see (1979AJ01, 1984AJ01). Measurements are also reported at E_d = 5.4, 6.0 and 6.8 MeV (1985LU08), 6 to 11 MeV (1985OS02), 10.05 MeV (1983BR23) and 12.0 and 21.0 MeV (1983IS10) and at E_α = 11.3 MeV (1987BR07). See also (1986DO1K).

More recently, measurements of the cross section and transverse tensor analyzing power at E_d = 7 MeV were made (1988GA14) with kinematic conditions chosen to correspond to production of the singlet deuteron. Coulomb and nuclear field effects in these reactions are discussed in (1987KO1X, 1988KA38). Cross sections and polarization observables from data at E_d < 12, 17 MeV are compared with three-body model predictions in (1988SU12).

For reaction (b), measurements of vector and tensor analyzing power at E_d = 35, 45 MeV have been reported (1986BR1N, 1986VA23, 1986VUZZ, 1987VU1A). Cross sections and polarization observables were measured at E_d = 32.1, 35.15, 39.6, 49.7 MeV to investigate ³H and ³He asymptotic normalization constants (1987VU1B) and charge symmetry breaking (1988VU01). Cross sections and polarization observables measured at E_cm = 14 - 33 MeV (1989BR23) were compared with microscopic-model predictions in a study of isospin violation. See also (1990BR09). The role of tensor force was explored in (1988BR18).

For earlier work and other breakup channels, see (1988AJ01).

8. 4He(d, d)4He

Eb = 1.4743

Elastic differential cross-section and polarization measurements have been carried out up to E_α = 166 MeV and E_d = 45 MeV: see (1974AJ01, 1979AJ01, 1984AJ01). Measurements were also reported at E_d = 0.87 to 1.43 MeV (1984BA19, 1985BAYZ), at E_d = 11.9 MeV (1988EL01), 21 MeV (1986MI1E), 24.0 and 38.2 MeV (1986GR1D), 31.8 to 39.0 MeV (1986KO1M), 40 MeV (1989DE1A), 56 MeV (1985NI01) and at E_α = 7.0 GeV/c (1984SA39). A compilation of data for energies E_d = 1 - 56 MeV is presented in (1987GR08). For a study of the inclusive inelastic scattering at E_α = 7.0 GeV/c see (1987BA13).

Phase-shift analyses, particularly that by (1983JE03) which uses all available differential cross section, vector and tensor analyzing power measurements and L ≤ 5, in the range E_d = 3 to 43 MeV lead to the results displayed in 6.7 (in PDF or PS). It is found that the d-wave shifts are split and exhibit resonances at E_x = 2.19 (³D₃), 4.7 (³D₂) and 5.65 MeV (³D₁). (1983JE03) suggest very broad G₃ and G₄ resonances at E_d = (19.3) and 33 MeV, a D₃ resonance at 22 MeV and F₃ and F₂ resonances at ≈ 34 and ≈ 39 MeV, corresponding to states which are primarily of (d + α) parentage.

(1985JE04) have investigated the points where A_yy = 1 and report four such points at E_d = 4.30 [θ_cm = 120.7°], 4.57 (58.0°), 11.88 (55.1°) and 36.0 ± 1.0 MeV (150.1 ± 0.3°). [For the latter see also (1986KO1M)]. The correspondence of these polarization maxima to ⁶Li states is discussed by (1985JE04). For a discussion of the M-matrix see (1988EL01). For work on (α + d) correlations involving ⁶Li*(0, 2.19, 4.31 + 5.65) see (1987CH08, 1987CH33, 1987PO03) and (1987FO08).

For additional references to early work see references cited in (1988AJ01).

A considerable body of theoretical work on the ⁴He + d channel has been done since the previous review (1988AJ01). A list of references with brief descriptions is provided in 6.8 (in PDF or PS).

9. (a) 4He(3He, p)6Li	Qm = -4.0192
(b) 4He(3He, pd)4He	Qm = -5.49349

Angular distributions have been measured at E(³He) = 8 to 18 MeV and E_α = 42, 71.7 and 81.4 MeV: see (1974AJ01). More recently, proton polarization was measured as a function of angle at E_cm = 12.6 MeV (1989GR02). At E_α = 28, 63.7, 71.7 and 81.4 MeV the α-spectra show that the sequential decay (reaction (b)) involves ⁶Li*(2.19) and possibly ⁵Li: see (1979AJ01). See also the recent theoretical work of (1993GO16) and the multiconfiguration RGM calculations of (1995FU16).

10. (a) 4He(α, d)6Li	Qm = -22.3722
(b) 4He(α, pn)6Li	Qm = -24.5968
(c) 4He(α, αd)2H	Qm = -23.84653

Reactions (a) and (b) have been studied to E_α = 158.2 MeV [see (1979AJ01, 1984AJ01)] and at 198.4 MeV (1985WO11). The dependence of the cross section on energy shows that the α + α process does not contribute significantly to ⁶Li (and ⁷Li) synthesis above E_α = 250 MeV (1985WO11) [and see for additional comments on astrophysical problems]. A more recent measurement of the cross section for reaction (b) (2001AU06, 2001ME13) at E_α = 159.3, 279.6 and 619.8 MeV found cross sections which differ significantly from tabulated values commonly used in cosmic-ray production calculations and lead to lower predicted production of ⁶Li. For reaction (c) [and excited states of ⁴He] see (1984AJ01): ⁶Li*(2.19) is involved in the process.

11. 6He(β-)6Li

Qm = 3.508

See ⁶He, reaction 1.

12. (a) 6He(p, n)6Li	Qm = 2.7254
(b) 6He(p, p)6He

The (p, n) reaction has been studied in inverse kinematics by ¹H(⁶He, ⁶Li)n experiments with secondary ⁶He beams. An experiment utilizing a secondary ⁶He beam with E(⁶He) = 42 MeV/A was reported by (1995CO05, 1998CO1M, 1998CO19, 1998CO28). The ⁶Li ground state and E_x = 3.56 MeV state were observed. Angular distributions were reported and the ratio of the cross section for the Gamow-Teller transition to the ground state and the Fermi transition to the isobaric analog state was measured. The reaction was also studied at E/A = 93 MeV (1996BR30). The 0° ground state cross section was measured to be dσ/dΩ = 43 ± 16 mb/sr. The ratio of Gamow-Teller to Fermi strength was found to be (87 ± 6)% of that expected from p, n systematics and beta decay. Differential cross sections at E/A = 41.6 - 68 MeV were measured by (1997CO04) to study the effects of halo structure. Measurements on reactions (a) and (b) utilizing a secondary ⁶He beam at 36 MeV/A are reported by (2001DE19).

The status of theoretical and experimental research on nuclei featuring a two-particle halo was reviewed in (1996DA31).

13. 6Li*(0+; 1) → α + d

Qm = 2.0886

A theoretical study in a microscopic three-cluster model of the parity-violating α + d decay of the lowest 0⁺ state in ⁶Li (E_x = 3.5629 MeV) is described in (1996CS03). A phase shift analysis of ⁴He + d was used in a determination of the vertex constant for the ⁶Li(1⁺; 0)_g.s. → α + d virtual decay by (1992BLZX, 1993BL09, 1997KU14). See also (1990RY07, 1991KR02, 1993BO38).

14. (a) 6Li(γ, n)5Li	Qm = -5.389
(b) 6Li(γ, p)5He	Qm = -4.497
(c) 6Li(γ, d)4He	Qm = -1.4743
(d) 6Li(γ, np)4He	Qm = -3.6989
(e) 6Li(γ, t)3He	Qm = -15.7947

The previous review (1988AJ01) summarizes the information on these reactions as follows: "The (γ, n) and (γ, Xn) cross sections increase from threshold to a maximum at E_γ ≈ 12 MeV then decrease to E_γ = 32 MeV: see (1984AJ01) and (1988DI02). (1984DY01) also report a broad peak at 16 MeV. The cross section for photoproton production (reaction (b)) is generally flat up to 90 MeV. [The previously reported hump at E_γ ≈ 16 MeV is almost certainly due to oxygen contamination: see (1984AJ01).] See also (1988CA11) and ⁵He. The cross section for reaction (c) is ≤ q5 μb in the range E_γ = 2.6 to 17 MeV consistent with the expected inhibition of dipole absorption by isospin selection rules: see (1966LA04). The onset of quasideuteron photodisintegration between 25 and 65 MeV is suggested by the study of (1984WA18; E_γ(bremsstrahlung) = 67 MeV). The 90° differential cross section for reaction (e) decreases monotonically for E_γ = 18 to 70 MeV: reaction (e) contributes ≈ 1/3 of the total cross section for ⁶Li + γ, consistent with a ³H + ³He cluster description of ⁶Li_g.s. with θ² ≈ 0.68. The agreement with the inverse reaction, ³H(³He, γ) [see reaction 3] is good: see (1984AJ01). See also (1986LI1F)."

"The absorption cross section has been studied in the range E_γ ≈ 100 to 340 MeV; it shows a broad bump centered at ≈ 125 MeV and a fairly smooth increase to a maximum at ≈ 320 MeV: see (1984AJ01). For spallation studies see (1974AJ01, 1984AJ01). For pion production see (1986GL07, 1987GL01) and (1984AJ01)."

Since the previous review (1988AJ01) tagged photons were used to study ⁶Li(γ, p) at θ_p = 0° for E_γ ≈ 59 and 75 MeV. Strong evidence for the photo-deuteron mechanism was found. Measurements made for angles between 30° and 150° (1995DI01) showed most of the strength occurring in three-body breakup channels. Studies at these same energies of the (γ, d) and (γ, t) reaction were reported in (1997DI01). See also (1994RY01). Measurements of ⁶Li(γ, d) at E_γ ≈ 60 MeV indicated strict non-violation of the isospin selection rule for E1 absorption.

The (γ, pn) reaction was also studied at E_γ = 55 - 100 MeV with bremsstrahlung photons and with linearly polarized tagged photons for E_γ = 0.3 - 0.9 GeV. See also (1990RIZX).

Linearly polarized photons were used to measure the cross section asymmetry in ⁶Li(γ, t)³He up to E_γ ≈ 70 MeV (1989BU10) and differential cross sections up to E_γ ≈ 90 MeV (1993DE07, 1995BU08). Results of a measurement of the absolute total photoabsorption cross section for E_γ = 300 - 1200 MeV are presented in (1994BI06).

A list of theoretical references relating to ⁶Li photonuclear reactions with brief descriptions is provided in 6.9 (in PDF or PS).

15. 6Li(γ, γ)6Li

The width, Γ_γ, of ⁶Li*(3.56) = 8.1 ± 0.5 eV: see (1974AJ01) and 6.4 (in PDF or PS) in (79AJ01); E_x = 3562.88 ± 0.10 keV: see (1984AJ01). See also (1987PI06). The results of an absolute measurement of the total photoabsorption cross section are described in (1994BI06). Photon absorption and photon scattering for light elements is discussed in terms of a collective resonance phenomenon in (1990ZI03).

16. (a) 6Li(γ, π0)6Li	Qm = -134.97660
(b) 6Li(γ, π+)6He	Qm = -143.0780
(c) 6Li(γ, π-)6Be	Qm = -143.8579

Measurements of neutral-pion photoproduction yield (reaction (a)) for E < 10 MeV above threshold were reported in (1989NA23). The total cross section was measured in the energy region from the reaction threshold to E_γ ≈ 146.5 MeV (1989GL07) and analyzed in the impulse approximation. The cross section increases monotonically to σ = 6.50 ± 0.96 μb at E_γ = 146.5 MeV. See also (1986GL07, 1987GL01) and (1984AJ01). An analysis (1991TR1C) of early measurements suggests that anomalously large measured values of the cross section are due to target impurities. The differential cross section at small angles at energies E ≈ 300 - 450 MeV has been measured by (1991BE16). Total and differential cross sections were measured within 23 MeV of threshold with tagged photons by (1999BE14). Differential cross sections for reaction (b) leading to the ⁶He ground state have been measured at E_γ = 200 MeV (1991SH02) and analyzed by DWBA. See also the measurements of (1991GA26). The energy distributions of electroproduced π⁺ at E_e ≈ 200 MeV were measured and (γ, π⁺) cross sections were deduced (1994SH38). For reaction (c) see (1988KA41, 1991GA26).

Theoretical studies of pion photoproduction include: an impulse-approximation calculation for (γ, π⁰) at E_γ = 300 MeV (1989TR09); an impulse approximation and shell model study of inelastic photoproduction of pions (1991TR02); a DWIA Feynman-diagram production-operator-based calculation of (γ, π⁺) at E_γ = 200 MeV (1990BE49); and multicluster dynamic-model calculation of π⁺ photoproduction off ⁶Li (1995ER1B); and an exclusive (γ, π⁺) production calculation for E_γ = 200 MeV (1995DO24).

17. (a) 6Li(e, e)6Li
(b) 6Li(e, ep)5He	Qm = -4.497
(c) 6Li(e, ed)4He	Qm = -1.4743
(d) 6Li(e, et)3He	Qm = -15.7947

The previous review (1988AJ01) summarized the information then available on electron scattering as follows: "The elastic scattering has been studied for E_e = 85 to 600 MeV: see (1974AJ01, 1979AJ01, 1984AJ01). The results appear to require that the ground state be viewed as an α-d cluster in which the deuteron cluster is deformed and aligned. The ground-state M1 current density has also been calculated (1982BE11). A model-independent analysis of the elastic scattering yields r_r.m.s. = 2.51 ± 0.10 fm. See also the discussion in (1984DO20)."

6.10 (in PDF or PS) summarizes the results obtained in the inelastic scattering of electrons. Form factors have been measured for ⁶Li*(2.19, 3.56, 5.37) as well as for the t + ³He continuum up to 4 MeV above threshold [no narrow structures corresponding to ⁶Li states are observed]: see (1984AJ01)". In more recent work, nucleon spin structure functions were extracted from measurements of deep inelastic scattering on polarized targets by (1999RO13).

For reaction (b) see ⁵He and (1987VA08) and (1987VA1N). Angular distributions for the d₀ group in the (e, d₀) reaction have been measured for E_x = 10 to 28 MeV. The deduced E1 and E2 components of the (γ, d₀) cross section show no structure. The E1 strength implies non-negligible isospin mixing in this energy region (1986TA06). Triple differential cross sections were measured for E_x = 27 - 49 MeV in a search for GDR evidence (1999HO02). At E_e = 480 MeV (reaction (c)) the α-d momentum distribution in the ground state of ⁶Li has been studied. The results are well accounted for by an αNN model. The α-d probability in the ground state of ⁶Li is 0.73 [estimated ± 0.1]. The data are consistent with the expected 2S character of the α-d relative wave function (1986EN05). See also (1986EV1A). π⁰ production involving ⁶Li*(2.19, 3.56, 5.37) is reported at E_e = 500 MeV (1987NA1I).

For the earlier work see (1979AJ01, 1984AJ01) and the references cited in (1988AJ01).

Since the previous review (1988AJ01), experimental results on quasielastic response have been reviewed (1988LO1E). Measurements of the quasielastic scattering cross section for electrons on ⁶Li are reported at momentum transfer 0.85 - 2.3 fm^-1 (1988BU25). See also the measurements at E_e = 80 - 680 MeV by (1989LI09). Cross sections for ⁶Li(e, ep) were measured in the missing energy region 0 ≤ E_m ≤ 30 MeV and in the range -100 ≤ p_m ≤ 200 MeV/c of missing momentum (1989LA22). The ⁶Li → p + (nα) spectral function was measured (1989LA13). The ratio of transverse and longitudinal response function was investigated in (1990LA06). See also the review (1990DE16) of proton spectral functions and momentum distributions in (e, e'p) experiments and see the report (1990GH1E) on nuclear density dependence of electron proton coupling in ⁶Li(e, e'p).

Reaction (c) was used (1990JO1D) in a study of correlation functions in ⁶Li. A measurement in parallel kinematics to study the mechanism of the ⁶Li(e, e'α)²H reaction is reported in (1991MI19, 1994EN04). Cross sections for ⁶Li(e, e't)³He (reaction (d)) at E_e = 523 MeV and the momentum-transfer dependence of the ³H and ³He knockout reaction was measured by (1998CO06).

A list of references to theoretical work related to electron scattering on ⁶Li is provided, along with brief descriptions, in 6.11 (in PDF or PS).

18. (a) 6Li(π±, π±)6Li
(b) 6Li(π+, π-)
(c) 6Li(π-, π+)6H	Qm = -27.77
(d) 6Li(π+, π+p)5He	Qm = -4.497
(e) 6Li(π+, p)5Li	Qm = 134.96
(f) 6Li(π-, p)5H	Qm = 114.2
(g) 6Li(π+, 2p)4He	Qm = 136.6536
(h) 6Li(π-, 2p)4n	Qm = 106.7933
(i) 6Li(π+, π+d)4He	Qm = -1.4743
(j) 6Li(π+, pd)3He	Qm = 118.3006
(k) 6Li(π+, 3He)3He	Qm = 123.7941
(l) 6Li(π-, 3He)3n	Qm = 114.5113

Elastic angular distributions have been measured at E_π⁺ ≈ 50 MeV [see (1984AJ01)] and at E_π^± = 100, 180 and 240 MeV (1986AN04; also to ⁶Li*(2.19)). Differential cross sections are also reported for E_π⁺ = 100 to 260 MeV to ⁶Li*(0, 2.19, 3.56, 4.25). The excitation function for the unnatural-parity transition to ⁶Li*(3.56) has an anomalous energy dependence (1984KI16).

A number of experimental studies with polarized targets have been reported for elastic and inelastic (E_x(⁶Li) = 2.19 MeV, J^π = 3⁺) scattering. Measurements of polarization observables are reported at E_π⁺ = 134, 164 MeV (1989TA21, 1990TA1L, 1991BO1R), E_π⁺ = 160 - 219 MeV (1991RI01, 1994RI06). Comparison of these data with a coupled channels model is discussed in (1995BO1H). See also the Δ-hole model analysis of (1992JU1B) and the multicluster dynamic model analysis by (1995RY1C). Calculations of cross sections and polarization observables at E_π⁺ = 80 - 260 MeV are presented in (1988ER06, 1988NA06). A theoretical study in terms of a strong absorption model is described in (1998AH06). Quantum Monte-Carlo calculations of cross sections for E_π = 100 - 240 MeV are reported in (2001LE01). Transition densities and B(E2) transition strengths were also calculated.

Measurements of pion double-charge exchange cross section (reactions (b) and (c)) at incident pion energies E_π = 180, 240 MeV are reported in (1989GR06, 1995FO1J). In (1991SE06) it is shown that continuum missing mass spectra from reaction (c) can be explained in terms of the presence of dineutrons in the products of the breakup.

Cross section measurements for reaction (d) at E_π⁺ = 130, 150 MeV are reported in (1987HU02). For a study of reaction (i) at E_π⁺ = 130 MeV, see (1987HU13).

Pion absorption followed by nucleon emission (reactions (e), (f), (g), (h), (j), (k), (l)) has been studied in a number of experiments. For reaction (k) see (1983BA26, 1983LO10, 1985MC05, 1986MC11). Measurements have been reported for cross sections for reaction (g) at E_π⁺ = 30, 50, 80, 115 MeV (1989ROZY); reactions (g) and (h) angular distributions at E_π = 70, 130, 165 MeV (1989YO05); reactions (g) and (h) angular correlations at E_π = 165 MeV (1989YO07); cross sections for reaction (g) at E_π⁺ = 115, 140, 165, 190, 220 MeV (1989ZHZZ); angular distributions for reaction (h) at E_π = 70, 130, 165 MeV (1989YO03); two-particle coincidences for reactions (g) and (h) at low energies (1991YO1C); cross sections at E_π = 50, 100, 150, 200 MeV (1990RA05, 1990RA20, 1992RA01, 1992RA11); differential and total cross sections for reaction (g) at E_π⁺ = 100, 165 MeV (1995PA22, 1996LO04); inclusive spectra of ³He produced in reaction (l) (1992AM1H, 1993AM09); total reaction cross sections for (π⁺, X), (π^-, X) at E_π = 42 - 65 MeV (1996SA08). See also the earlier work on reaction (g) at E_π⁺ = 59.4 MeV (1986RI01), and see the compilation and review of (1992BA57, 1993IN01).

Analysis of particle emission following π⁺ absorption on ⁶Li (1990RA20) has produced evidence for a three-nucleon absorption model. Distorted-wave impulse approximation calculations of cross sections and analyzing powers have been made (1992KH04) for two-nucleon pion absorption on polarized ⁶Li targets. A model based solely on isospin was used (1993MA14) in a calculation of ratios of pion absorption on three nucleons and agreement with experiment suggest a one-step process.

19. (a) 6Li(n, n)6Li
(b) 6Li(n, nd)4He	Qm = -1.4743
(c) 6Li(n, p)6He	Qm = -2.7254
(d) 6Li(n, d)5He	Qm = -2.272
(e) 6Li(n, t)4He	Qm = 4.7829
(f) 6Li(n, α)3H	Qm = 4.7829

Angular distributions involving the groups to ⁶Li*(0, 2.19) have been reported at E_n = 1.0 to 14.6 MeV [see (1984AJ01)], 4.2, 5.4 and 14.2 MeV (1985CH37; n₀, n₁), 7.5 to 14 MeV (1983DA22; n₀), 8.9 MeV (1984FE1A; n₀), 8.0 and 24 MeV (1986HAZR; n₀, n₁), E_n = 5 to 17 MeV (1986PF1A; n₀), 11.5, 14.1 and 18 MeV (1998CH33; n₀, n₁), and at 11.5 and 18.0 MeV (1998IB02; n₀, n₁).

An analysis (1988HA25) of (n, n) and (n, n') data at E_n = 24 MeV indicated that neutron and proton transition densities were approximately equal (ρ_n ≈ ρ_p) in ⁶Li. Cross sections and analyzing powers for E_n = 8 - 40 MeV were analyzed (1989HAZV) with microscopic optical model potentials. Secondary neutron spectra induced by 14.2 MeV neutrons on ⁶Li were measured by (1993XI04).

An analysis of (n, n') data at E_n = 7.45 - 14 MeV is discussed in (1990BE54). See also the calculation for elastic coherent and incoherent scattering of thermal neutrons on ⁶Li (1990GO26) and the multi-cluster dynamic model calculation for ⁶Li(n, n) at E_n = 12 MeV (1992KA06).

Theoretical studies of ⁶Li(n, n) include multiconfiguration resonating group calculations (1988FU09, 1991FU02), folding model descriptions for E_n = 25 - 50 MeV (1993PE13), study of antisymmetry in NN potentials (1995CO18), study of optical model potentials for intermediate energies (1996CH33).

For reaction (b) see (1984AJ01, 1985CH37, 1993XI04, 1994EL08).

A number of experiments on the (n, p) charge exchange (reaction (c)) have been reported. They include: measurements of σ(E_p) and σ(θ) at E_n ≈ 198 MeV (1987HE22); σ(θ, E_p) at E_n ≈ 118 MeV (1987PO18, 1988HA12, 1998HA24); σ(θ) at E_n = 198 MeV (1988JA01); σ(θ) to explore the Gamow-Teller sum rule (1988WA24); σ(θ), σ(E_p) at E_n = 280 MeV for an isospin symmetry test (1990MI10); σ(θ, E) at E_n = 60 - 260 MeV (1992SO02); and polarization observables at E_n = 0.88 GeV (1996BB23).

For reaction (e), measurements were reported at thermal neutron energies (1994IT04) and at E_n < 10 MeV (1994DR11). For reaction (f), measurements of parity violation with cold polarized neutrons are described in (1990VE16, 1993VE1A, 1996VE02). A discussion of nuclear reaction rates and primordial ⁶Li is presented in (1997NO04). See also the application-related calculation of (1993FA01).

Theoretical work related to reactions (b), (c), (d), (e), (f) includes: dynamical cluster-model calculation (1991DA08); microscopic calculation in a 3-particle α + 2N model (1993SH1G); supermultiplet-symmetry-approximation calculation at E_n = 6.77 MeV (1993DU09); multiconfiguration RGM calculation (1995FU16); and three-body cluster model calculations of ⁶Li(n, p) at E_n = 50 MeV (1997DA01, 1997ER05).

20. (a) 6Li(p, p)6Li
(b) 6Li(p, 2p)5He	Qm = -4.497
(c) 6Li(p, pd)4He	Qm = -1.4743
(d) 6Li(p, p3H)3He	Qm = -15.7947
(e) 6Li(p, pn)5Li	Qm = -5.39

Proton angular distributions have been measured for E_p = 0.5 to 800 MeV [p₀, p₁, p₂, p₃] [see (1966LA04, 1974AJ01, 1984AJ01)] and at E_p = 5 to 17 MeV (1986PF1A; p₀).

Double-differential cross sections for the continuum yield [E_x = 1.5 - 3.5 MeV] are reported at E_p = 65 MeV (1987TO06). See also (1983GLZZ, 1983PO1B, 1983POZX). More recently differential cross sections and/or polarization observables have been measured at E_p = 6 - 10 MeV (1989HA17) [optical model analysis]; E_p = 1.6 - 10 MeV (1989HA18) [phase shift analysis]; E_p = 65, 80 MeV (1989TO04) [DWIA analysis]; E_p = 200 MeV (1990GL04); E_p = 65 MeV (1992NA02) [microscopic DWBA analysis]; E_p = 72 MeV (1994HE11) [depolarization parameters]; E_p < 2.2 MeV (1995SK01) [deduced resonance parameters]; E_p = 0.88 GeV (1996BB23) [polarized target]; E_p = 250 - 460 keV (1997BR37), E_p = 280 MeV (1990MI10) [deduced isospin symmetry test]; E_p = 14 MeV [optical model, coupled channels]; E(⁶Li) = 62, 72, 75 MeV/A, ¹H(⁶Li, p) [neutron halo states] (1996KUZU); E_p = 1.6 - 2.4 GeV (1999BB21, 1999DE47). For a summary of the results on excited states see 6.12 (in PDF or PS).

Reaction (b) was studied at 70 MeV (1983GO06), at 50 - 100 MeV (1984PA1B, 1985PA1B) and 1 GeV (1985BE30, 1988BE2B, 2000MI17): see ⁵He and (1984AJ01) for the earlier work. Reaction (c) has been studied at E_p = 9 MeV to 1 GeV [see (1974AJ01, 1979AJ01, 1984AJ01)] and at 20 and 42 MeV (1983CA13) [report involvement of ⁶Li*(4.31, 5.65)], at 70 MeV (1983GO06, 1985PAZL, 1985PA04) and at 119.6 and 200.2 MeV (1984WA09, 1985WA25). In the latter experiments the spectroscopic factors for ⁶Li_g.s. are deduced to be 0.76 [at 119.6 MeV] and 0.84 [at 200.2 MeV] using DWIA and a bound-state Woods-Saxon 2S wave function (1984WA09, 1985WA25).

Work on reaction (d) has suggested that the ³He + t parentage of ⁶Li is comparable with the α + d parentage: see (1984AJ01). See also (1985PAZL). Reaction (e) was studied at E_p = 70 MeV (1988PA27). See also ⁵Li, ⁶Be and (1985BE30, 1993ST06). The (p, 3p) reaction has been studied by (1984NA17). The spectral function for pn pairs in ⁶Li was obtained in a study of the ⁶Li(p, pα)pn reaction at E_p = 200 MeV (1990WA17). A measurement of tensor analyzing powers in ¹H(⁶Li, d or α or t)X with 4.5 GeV polarized ⁶Li deuterons provided information on the ⁶Li D state (1992PU03). Systematic studies of electron screening effects on low energy reactions including ⁶Li + p are reported in (1992EN01, 1992EN04, 1995RO37). For antiproton studies see (1987AS06). See also (1984AJ01, 1988AJ01) for the earlier work.

Theoretical work on these reactions reported since the previous review (1988AJ01) is listed in 6.13 (in PDF or PS) along with brief descriptions.

21. (a) 6Li(d, d)6Li
(b) 6Li(d, pn)6Li	Qm = -2.2246
(c) 6Li(d, 2d)4He	Qm = -1.4743
(d) 6Li(d, αp)3H	Qm = 2.5583
(e) 6Li(d, αn)3He	Qm = 1.7946

Angular distributions of deuterons have been measured at E_d = 4.5 to 19.6 MeV [see (1979AJ01)] and at 50 MeV (1988KO1C, 1996RU10). The 0⁺, T = 1 state, ⁶Li*(3.56) is not appreciably populated. For a summary of the results on excited states see 6.12 (in PDF or PS). Gaussian potentials were derived for the description of ⁶Li + d elastic scattering by (1992DU07).

At E_d = 21 MeV reaction (b) shows spectral peaking (characteristic of ¹S₀ for the pn system [T = 1]) when ⁶Li*(3.56) is formed, in contrast with the much broader shape (characteristic of ³S₁) seen when ⁶Li*(0, 2.19) are populated. A study of reaction (c) at E_d = 52 MeV shows that the α-clustering probability, N_eff = 0.12^+0.12_-0.06 if a Hankel function is used. The α-particle and the deuteron clusters in ⁶Li have essentially a relative orbital momentum of l = 0. The D-state probability of the ground state of ⁶Li is ≈ 5% of the S-state. Quasi-free scattering is an important process even for E_d = 6 to 11 MeV. Interference effects are evident in reaction (c) proceeding through ⁶Li*(2.19, 4.31): this is due to the experiment being unable to determine whether the detected particle was emitted first or second in the sequential decay. Reactions (c) and (d) studied at E_d = 7.5 to 10.5 MeV indicate that the three-body breakup of ⁶Li at these low energies is dominated by sequential decay processes (1979AJ01, 1990YA11). Differential cross sections for cluster pickup by 20 MeV/A deuterons on ⁶Li were measured by (1995MA57).

Calculation of Maxwellian rate parameters for reaction (d) and (e) are described in (2000VO08). See also ⁸Be and references cited in (1988AJ01).

22. 6Li(t, t)6Li

At E_t = 17 MeV angular distributions have been measured for the tritons to ⁶Li*(0, 3.56): see (1979AJ01).

23. (a) 6Li(3He, 3He)6Li
(b) 6Li(3He, pα)4He	Qm = 16.878

Angular distributions have been measured at E(³He) = 8 to 217 MeV [see (1979AJ01, 1984AJ01)] and at 34, 50, 60 and 72 MeV (1986BR31; elastic).

More recently, differential cross sections were measured for elastic scattering at E(³He) = 93 MeV (1994DO32), and at E(³He) = 60 MeV (1995MA57), and for inelastic scattering to ⁶Li*(E_x = 2.185 MeV, J^π = 3⁺) at E(³He) = 50, 60, 72 MeV (1995BU20). A microscopic-potential analysis of data at E(³He) = 34, 50, 60, 72 MeV is described in (1993SI06). Differential cross section and energy spectra were compiled and analyzed by (1995MI16). For reaction (b), cross sections have been measured at E(³He) = 11, 13, 14 MeV (1989ARZR, 1989AR08); E(³He) = 2.5 MeV (1989AR20); E(³He) = 1.6 MeV (1991AR25); E(³He) = 1.6 - 9 MeV (1992AR20); E(³He) = 8 - 14 MeV (1995KO51); E(³He) = 2.0, 22 MeV (1992DA1K); E(³He) = 7, 9 MeV (1993AR12). A calculation of near-threshold two-fragment resonance amplitudes and widths for this reaction at E(³He) = 8 - 14 MeV was reported in (1995KO51). See also ⁵Li, (1984AR17, 1987ZA07), and ⁹B in (1988AJ01).

24. (a) 6Li(α, α)6Li
(b) 6Li(α, 2α)2H	Qm = -1.4743

Angular distributions (reaction (a)) have been measured at E_α = 1.39 to 166 MeV [see (1974AJ01, 1979AJ01, 1984AJ01)] and at E_α = 36.6 and 50.5 MeV (1986BR31). See also (1986ROZK, 1987BU27). See also ¹⁰B in (1988AJ01).

More recent measurements at E_α = 50.5 MeV of elastic and inelastic ⁶Li*(E_x = 2.185 MeV, J^π = 3⁺) were reported by (1994BUZY, 1996BU06). Tensor polarization for inelastic scattering to ⁶Li*(2.185, 3⁺) has been measured at E_α = 80 MeV (1992KO19, 1993KO33). Angular distributions for (α, α') in the continuum region were studied at E_α = 50 MeV (1992SA01) and at E_α = 40 MeV (1994SA32), at E_α = 10 MeV/A (1996SI13) and at E_α = 119 MeV (1993OK1A). Cross sections and analyzing powers for elastic scattering of polarized ⁶Li by ⁴He are reported for E(⁶Li) = 50 MeV (1995KE10) and E_cm = 11.1 MeV (1996GR08).

Studies of continuum coupling effects in inelastic scattering are described in (1995KA1Y, 1995KA43, 1997RU06, 2000RU03). Folding-model potential analyses of elastic scattering are reported in (1993SI09, 1995SA12). Multiconfiguration resonating group methods applied to the ⁶Li + α system are discussed in (1994FU17, 1995FU11). Other recent theoretical studies include: a potential model description (1999MA02); analysis of density distribution influence (1998GO1J); a phase-shift-analysis determination of the asymptotic D- to S-state ratio (1999GE02); a calculation for E_α = 16.3 and 48 MeV with a modified Volkov-potential (2000KO52); and a calculation of the nuclear potential and polarization tensor for E_α = 27.2 MeV (2000KO67). See also (1988KO32, 1989LE07, 1999OG09).

Reaction (b) has been studied at E_α = 6.6 to 700 MeV: see (1974AJ01, 1979AJ01, 1984AJ01). At the latter energy and using a width parameter of 60.6 MeV/c the effective number of α + d clusters for ⁶Li_g.s., n_eff = 0.98 ± 0.05. The results are very model dependent: see (1984AJ01). At E_α = 27.2 MeV ⁶Li*(2.19) is very strongly populated (1985KO29). See also references cited in (1988AJ01).

In more recent work, two dimensional coincidence spectra of charged particles were measured at E_α ≈ 100 MeV (1992GA18). Quasi-free scattering processes were studied at E_α = 77 - 119 MeV (1992OK01), E_α = 118 MeV (1993OK1B), and E_α = 118.4 MeV (1997OK01). The four-body ⁶Li(α, 2α)pn breakup reaction was measured at E_α = 77 - 119 MeV (1992WA18, breakup cross sections); E_α = 118 MeV (1988WA29, 1989WA26; spectral functions of pn pair).

25. (a) 6Li(6Li, 6Li)6Li
(b) 6Li(6Li, 2d)4He4He	Qm = -2.9487
(c) 6Li(6Li, α)4He4He	Qm = 20.8979

Angular distributions of ⁶Li ions have been studied for E(⁶Li) = 3.2 to 36 MeV [see (1974AJ01, 1979AJ01, 1984AJ01)] and at E(⁶Li) = 2.0 to 5.5 MeV (1983NO08) and 156 MeV (1985SA36; ⁶Li*(0, 2.19)), (1985MI05; elastic; ⁶Li*(2.19, 3.56) are also populated), (1987EY01; several states in ¹²C). Reaction (b) has been studied for E(⁶Li) = 36 to 47 MeV: enhancements in yield, due to double spectator poles, have been observed in d-d and α-α but not in α-d double coincidence spectra. The widths of the peaks are smaller than those predicted from the momentum distribution of α + d clusters in ⁶Li. ⁶Li*(2.19) was also populated. See references in (1984AJ01). Other work on reaction (b) is reported by (1984LA19: 2.4 and 4.2 MeV) and by (1985NO1A).

For reaction (c), the energy dependence of quasi-free effects were investigated in the range E(⁶Li) = 2.4 - 6.7 MeV (1987LA25, 1988LA11). An analysis (1996CH1C) used quasi-free data from reaction (c) to extract the ⁶Li(d, α)⁴He excitation function at astrophysical energies. See also ¹²C in (1985AJ01) and references cited in (1988AJ01).

More recently, elastic scattering angular distributions were measured for E(⁶Li) = 5 - 40 MeV (1997PO03; optical model analysis). Eikonal-approximation calculations of differential cross sections and phase shifts for E(⁶Li) = 156 MeV were reported in (1992EL1A).

26. 6Li(7Li, 7Li)6Li

Angular distributions have been measured at E(⁷Li) = 78 MeV to ⁶Li*(0, 2.19) (1986GLZU), and at E(⁷Li) = 9 - 40 MeV (1998PO03).

27. 6Li(9Be, 9Be)6Li

The elastic scattering has been studied in inverse kinematics at E(⁶Li) = 4.0, 6.0 and 24 MeV [see (1979AJ01)], at 32 MeV (1985CO09) and at 50 MeV (1988TRZY; also inelastic). Recently angular distributions for elastic and inelastic scattering to ⁶Li*(2.186, 3⁺) were measured (1995MU01) at E_cm = 7, 10, 12 MeV. Excitation functions for E_cm ≈ 4 - 12 were also reported. See also ⁹Be in (1988AJ01). For the interaction cross section at E(⁶Li) = 790 MeV/A see (1985TA18).

28. 6Li(10B, 10B)6Li

The elastic scattering has been studied at E(⁶Li) = 5.8 and 30 MeV: see (1979AJ01).

29. (a) 6Li(12C, 12C)6Li

(b) 6Li(13C, 13C)6Li

(c) 6Li(14C, 14C)6Li

The elastic and inelastic scattering (reaction (a)) has been studied at E(⁶Li) = 4.5 to 156 MeV [see (1984AJ01)] and at E(⁶Li) = 19.2 MeV (1983RU09), 36 and 45 MeV [and E(¹²C) = 72 and 90 MeV] (1984VI02, 1985VI03; also to ⁶Li*(2.19, 4.31) and to various states of ¹²C), at E(¹²C) = 58.4 MeV (1987PA12), 90 MeV (1987DE02; also to various states of ¹²C), 123.5 and 168.6 MeV (1988KA09; and to various states of ¹²C), 150 MeV (1987TA21, 1988TA08), 156 MeV (1987EY01; and to various states in ¹²C) and at 210 MeV (1988NA02). See also (1986SHZP, 1987PA12). More recently, measurements of cross sections and/or analyzing power observables have been reported at E(⁶Li) = 93 MeV (1989DE34); at E_cm = 13.3 MeV ((1989HN1A, 1995CA26) and to ⁶Li*(3⁺, 2.186) and ¹²C*(2⁺, 4.44)); at E(⁶Li) = 210 MeV (1989NA11, to ¹²C*(2⁺, 4.44)); at E(⁶Li) = 30 MeV (1989VA04, to ¹²C*(2⁺, 4.44)); at 50 MeV (1990TR02, to ¹²C*(2⁺, 4.44; 0⁺, 7.65; 3^-, 9.64)); at E(⁶Li) = 30 MeV (1994RE01); at E(⁶Li) = 30, 60 MeV (1996KE09, to ¹²C*(2⁺, 4.44; 0⁺, 7.65; 3^-, 9.64)); at E_cm = 20 MeV (1996GA29, to ⁶Li*(3⁺, 2.18) and ¹²C*(2⁺, 4.44)); at E(⁶Li) = 318 MeV (1993NA01); at E(⁶Li) = 30 MeV (1994RE15, to ¹²C*(2⁺, 4.44; 3^-, 9.64)); and at E(⁶Li) = 50 MeV (1995KE10). At E(⁶Li) = 34 MeV the d-α angular correlations involve ⁶Li*(0, 2.19) (1985CU04). See also (1988SE07), and see ¹²C in (1985AJ01, 1990AJ01). An experimental study of the α + d breakup in ⁶Li + ¹²C collision at E(⁶Li) = 156 MeV is reported in (1989JE01). For pion production see (1984CH16). For the interaction cross section at E(⁶Li) = 790 MeV/A see (1985TA18). For VAP measurements at E(⁶Li) = 30 MeV see (1988VAZY). Fusion cross sections for E(⁶Li) = 3.11 - 12.07 MeV are reported by (1998MU12).

The elastic scattering (reaction (b)) has been studied for E(⁶Li) = 5.8 to 40 MeV: see (1984AJ01). Measurements of differential cross sections for E_cm = 26 MeV and observations of a nuclear quasi rainbow were reported by (1994DE43). See also (1987CA30, 1988WO10). The elastic scattering (reaction (c)) has been measured for E(⁶Li) = 93 MeV (1987DE02). See also ¹⁸F and ¹⁹F in (1987AJ02) and references cited in (1988AJ01).

Several theoretical studies relating to ⁶Li + ¹²C have been reported. The role of the Pauli Principle in heavy ion scattering has been studied (1988GR32). The dispersive contribution to the ⁶Li + ¹²C real potential was estimated (1990KA14). Elastic cross sections for E(⁶Li) = 30 MeV were analyzed (1990SA05). A semimicroscopic analysis of inelastic scattering at E(⁶Li) = 156 MeV is described in (1992GA17). Folding model analysis of ⁶Li + ¹²C scattering is discussed in (1994NA03, 1994SA10, 1995KH03). Differential cross sections were analyzed with an S-matrix approach by (1998PI02).

Other theoretical descriptions of ⁶Li + ¹²C scattering are discussed in (1994SA33; strong absorption model), (1995IS1F; multiple diffraction interaction), and (1996CA01; microscopic description).

30. 6Li(16O, 16O)6Li

Elastic angular distributions have been reported at E(⁶Li) = 4.5 to 50.6 MeV [see (1984AJ01)], at E(⁶Li) = 35.3 and E(¹⁶O) = 94.2 MeV (1984VI02) and at 50 MeV (1988TRZY; also inelastic). At E(⁶Li) = 25.7 and E(¹⁶O) = 68.6 MeV (1984VI01, 1985VI03) report some σ(θ) to ⁶Li*(2.19) [and to ¹⁶O*(6.13)]. See also (1987PA12). See (1985VI03, 1986SC28) for studies of the breakup. Polarization observables have has been measured at E(⁶Li) = 25.7 MeV, and also using ¹⁶O ions (1987VAZY, 1989VA04). Measurements of E(⁶Li) = 50 MeV for elastic scattering and inelastic scattering to ¹⁶O*(2⁺, 6.05; 3^-, 6.13; 2⁺, 6.92; 1^-, 7.12) were reported (1990TR02). For fusion cross sections see (1986MA19). See also ¹⁶O in (1986AJ04), (1986MO1E, 1987PA12) and references cited in (1988AJ01). Theoretical work on this scattering reaction includes: E(⁶Li) = 29.8 MeV, optical model description (1990SA05); E(⁶Li) = 29.8 - 30.6 MeV, Pauli Principle rule (1988GR32); E(⁶Li) = 30.6, optical model analysis (1990SA05); projectile effects (1991BO48); E(⁶Li) = 154 MeV, 3-body cluster model (1991HI07); E(⁶Li) = 22.8 MeV, nonresonant breakup states (1991HI11); and E(⁶Li) = 30 MeV, double-folding model, role of Pauli Principle (1991SA26).

31. (a) 6Li(24Mg, 24Mg)6Li

(b) 6Li(25Mg, 25Mg)6Li

(c) 6Li(26Mg, 26Mg)6Li

(d) 6Li(27Al, 27Al)6Li

Elastic scattering for reaction (a) was studied at E(⁶Li) = 156 MeV (1995DE53). Reaction (c) has been studied at E(⁶Li) = 88 MeV and 36 MeV (1984AJ01) and at 44 MeV (1989RU05; polarization observables), and E(⁶Li) = 60 MeV (1994WA20; polarization observables). Reaction (d) was studied at E(⁶Li) = 156 MeV by (1987NI04; particles and gammas from inelastic scattering). See also the measurements at E(⁶Li) = 790 MeV/A (1985TA18).

Theoretical studies for these reactions include: analyzed non-Rutherford cross sections (1991BO48); effects of nonresonant breakup states (1991HI11); strong absorption model analysis (1994SA33); cluster folding interaction (1991HI07); coupled channels study (1992HI02); and cluster-folding analysis (1994RU11).

32. (a) 6Li(28Si, 28Si)6Li

(b) 6Li(30Si, 30Si)6Li

The elastic scattering has been studied at E(⁶Li) = 13 to 154 MeV [see (1984AJ01)], at 27 and 34 MeV (1983VI03) and at 210 MeV (1988NAZX). For a study of the decay see (1987NI04). See also references cited in (1988AJ01).

More recent measurements have been reported at E(⁶Li) = 210 MeV (inelastic σ(θ) to ²⁸Si*(first 2⁺ state) (1989NA11); elastic σ(θ), optical parameters (1989NA02); and E(⁶Li) = 318 MeV (σ(θ), folding model potentials (1990NAZZ, 1993NA01)). Related analyses and other theoretical studies include: Pauli Principle role (1988GR32, 1991SA26); scattering matrix approach (1990KU23); deduced model parameters (1990SA05); non-Rutherford cross section thresholds (1991BO48); cluster-folding interactions (1991HI07); energy dependence, dispersion relation (1991TI04); strong absorption model (1994SA33); E(⁶Li) = 210, 318 MeV, energy approximation (1995EM03); microscopic description (1996CA01); microscopic potentials, density matrix formalism (1996KN02); E(⁶Li) = 35, 53 MeV/A, breakup effect (1997SA57); and E(⁶Li) = 210, 315 MeV, S-matrix approach (1998PI02).

For reaction (b) see (1987AR13).

33. (a) 6Li(39K, 39K)6Li

(b) 6Li(40Ca, 40Ca)6Li

(c) 6Li(44Ca, 44Ca)6Li

(d) 6Li(48Ca, 48Ca)6Li

Elastic scattering has been studied for E(⁶Li) = 26 to 99 MeV: see (1984AJ01, 1988AJ01), and at E(⁶Li) = 34 MeV (reaction (b)) by (1987VA31) and at 210 MeV (1988NAZX, 1989NA02; reaction (b)). ⁶Li*(2.19) has been studied at E(⁴⁰Ca) = 227 MeV (1987VA31). Reaction (d) was studied at E(⁶Li) = 150 MeV (1990KAZH). For fusion measurements (reaction (b)) see (1984BR04). For breakup measurements (reaction (b)) see (1984GR20, 1990YA09, 1992YAZW, 1993GU10, 1995AR15, 1996YA01).

For theoretical studies related to these reactions see: energy and target dependence of projectile breakup (1987SA21); sequential breakup cross sections (1987VA31); role of Pauli Principle (1988GR32); exchange effects (1988KH08, 1990DA23); imaginary part of channel-coupling potentials (1990TA1I); E(⁶Li) = 30 MeV, deduced optical model parameters (1990SA05); cluster folding interactions (1991HI07); strong absorption model (1994SA33); S-matrix approach (1995BE60, 1998PI02); and microscopic potentials (1996KN02). For earlier work see references cited in (1988AJ01).

34. (a) 7Li(γ, n)6Li	Qm = -7.249
(b) 7Li(γ, pπ-)6Li	Qm = -146.038

Transitions to ⁶Li*(0, 2.19, 3.56) have been observed in reaction (a): see (1979AJ01, 1984AJ01). Differential cross sections are reported for E_brem = 60 to 120 MeV for the n₀ + n₂ groups (1985SE17). Bremsstrahlung yield for (γ, n₀) was measured for E_γ = 7 - 9 MeV (1989KA30). Reaction (b) at 0.9 GeV involves ⁶Li*(2.19) (1985RE1A). See also the measurements of E_γ = 350 MeV reported by (1991GA26), and see ⁷Li, (1985ST1A, 1986BA2G, 1986GO1M).

An analysis of ⁷Li(γ, n) data in the giant resonance energy region is described in (1987VA05). Cluster effects were explored in (1992VA12). Calculation with a potential two cluster model are reported in (1997DU02).

35. 7Li(π-, π-p)6He

Qm = -9.9754

Quasielastic pion-proton backward scattering was measured at E_π = 0.7, 0.9, 1.25 GeV (2000AB25). Fermi momentum distributions for ⁶Li were deduced.

36. 7Li(π+, p)6Li

Qm = 133.1026

Differential cross sections have been measured at E_π⁺ = 75 and 175 MeV for the transitions to ⁶Li*(0, 2.19): see (1984AJ01). Proton spectra measured at momentum exchange 660 MeV/c (1989LIZO) provided evidence for an η-meson nuclear bound state.

37. (a) 7Li(p, d)6Li	Qm = -5.0254
(b) 7Li(p, pn)6Li	Qm = -7.2499

Angular distributions of deuterons (reaction (a)) have been studied for E_p = 167 to 800 MeV [see (1979AJ01, 1984AJ01)] and at 18.6 MeV (1986GO23, 1987GO27; d₀, d₁, d₂; see for spectroscopic factors), 200 and 400 MeV (1985KR13; d₀, d₁; d₂ is weakly populated at 200 MeV) and at 800 MeV (1984SM04; d₀, d₁). The ratio of the intensities of the groups to ⁶Li*(2.19) and ⁶Li_g.s. increases with energy. It is suggested that this can be understood in terms of a small admixture of 1f orbital in these states (1985KR13). A DWBA analysis of E_p = 185 MeV data leads to C²S = 0.87, 0.67, 0.24, (0.05), 0.14, respectively for ⁶Li*(0, 2.19, 3.56, 4.31, 5.37). No other states were seen below E_x ≈ 20 MeV: see (1979AJ01). The tensor analyzing power T₂₀ was measured for the ¹H(⁷Li, d)⁶Li reaction at E(⁷Li) = 70 MeV to ⁶Li*(0, 2.186) (1991DA07). Data at E_p = 33.6 MeV were analyzed by (1991AB04) in a test for Cohen-Kurath wave functions. See also the analysis of data at E_p = 698 MeV by (1993AL05; η production). In reaction (b) at E_p = 1 GeV the separation energy between ≈ 6.5 MeV broad 1p_3/2 and 1s_1/2 groups is reported to be 18.0 ± 0.8 MeV (1985BE30, 1985DO16). See also (1983LY04, 1988BE1I, 1988GUZW). Differential cross sections were measured at E_p = 70 MeV (1988PA26) and at E_p = 2.7 - 3.8 MeV (1988BO37; application). See also the measurements for nuclear microprobe utilization (1995RI14).

38. 7Li(d, t)6Li

Qm = -0.9927

A study at E_d = 23.6 MeV of the relative cross sections of the analog reactions ⁷Li(d, t)⁶Li (to the first two T = 1 states at 3.56 and 5.37 MeV) and ⁷Li(d, ³He)⁶He (to the ground and 1.80 MeV excited states) shows that ⁶Li*(3.56, 5.37) have high isospin purity (α² < 0.008): this is explained in terms of antisymmetrization effects which prevent mixing with nearby T = 0 states: see (1979AJ01). (1987BO39) [E_d = 30.7 MeV] deduce that the branching ratio of ⁶Li*(4.31) [2⁺] into a dinucleon [T = 1, S = 0] is (85 ± 10)%: see also reactions 21 in ⁶He and 4 in ⁶Be. See also (1987GUZZ; E_d = 18 MeV; angular distributions to ⁶Li*(0, 2.19, 3.56)) and (1984BL21, 1986AV01, 1988GUZW). See also the analysis method discussed in (1995GU22; DWBA and dispersive theory).

39. (a) 7Li(3He, α)6Li	Qm = 13.3277
(b) 7Li(3He, dα)4He	Qm = 11.8534

Angular distributions have been reported at E(³He) = 5.1 to 33.3 MeV [see (1974AJ01, 1984AJ01): the lower energy work has not been published] and more recently at E(³He) = 60 MeV (1994BUZX). Excited states observed in this reaction are displayed in 6.12 (in PDF or PS). See also (1968CO07) which reported observation of ⁶Li states at 0.0, 2.17 ± 0.02, 3.55 ± 0.02 and 5.34 ± 0.02 MeV. (1986AN04) have analyzed unpublished data which suggest the involvement of several broad highly excited states of ⁶Li. See also (1987AL23).

Several attempts have been made to observe the isospin-forbidden decay of ⁶Li*(5.37) [2⁺; 1] via ⁷Li(³He, α)⁶Li* → d + α: the branching is < 1%. Γ_p/Γ = 0.35 ± 0.10 and Γ_p + n/Γ = 0.65 ± 0.10 for ⁶Li*(5.37): see (1979AJ01). ⁴He + d spectra suggest the excitation of ⁶Li*(4.3) [E_x = 4.3 ± 0.2 MeV, Γ = 1.6 ± 0.3 MeV] and ⁶Li*(5.7) [E_x = 5.65 ± 0.2 MeV, Γ = 1.65 ± 0.3 MeV]: see (1984AJ01). See also (1985DA29, 1988BO1Y). A more recent measurement at E(³He) = 4, 5, 6 MeV (1995AR14) gave values for the width of of ⁶Li*(4.31) in agreement with the adopted value Γ = 1700 ± 200 keV and found no dependence on incident energy. Measurements of d-α coincidence spectra at E(³He) = 11.5 MeV (1988AR20) and 5.0 MeV (1991AR19) gave spectroscopic parameters for ⁶Li*(5.65) in agreement with adopted values (1988AJ01). At E(³He) = 120 MeV the missing mass spectra for (³He, 2d) and (³He, pt) reflect the population of ⁶Li*(0, 2.19) and suggest broad structures at E_x = 28.5 and 32.9 MeV (1985FR01). See also ¹⁰B in (1988AJ01) and (1983KU17, 1988BO1J).

40. (a) 7Li(6Li, 7Li)6Li
(b) 7Li(7Li, 8Li)6Li	Qm = -5.2171

At E(⁶Li) = 93 MeV a broad group (Γ ≈ 11 MeV) centered at E_x = 20 MeV is reported in addition to other peaks at E_x = 17.1 ± 0.3, 18.9 ± 0.3 and 21.2 ± 0.3 MeV (1987GLZW). See (1984KO25) for reaction (b).

41. 9Be(γ, t)6Li

Qm = -17.6885

Cross section measurements were made with virtual photons using electrons at 21.0 - 39.0 MeV (1999SH05). A compilation and evaluation of cross section data for E_γ < 30 MeV has been done by (1999ZHZN).

42. (a) 9Be(p, α)6Li	Qm = 2.1254
(b) 9Be(p, 2α)2H	Qm = 0.6510
(c) 9Be(p, pt)6Li	Qm = -17.6885

Angular distributions of α-particles (reaction (a)) have been measured at E_p = 0.11 to 45 MeV. [see (1974AJ01, 1979AJ01)] and at E_p = 22.5, 31 and 41 MeV (1986HA27; α₀, α₁, α₂; see for spectroscopic factors). See also 6.12 (in PDF or PS) and (1984AJ01). Recent measurements of angular distributions and analyzing power at E_p = 77 - 321 keV are reported by (1998BR10). Measurements at E_x = 1 GeV are reported in (2000ANZX). Calculations of the cross section and polarization observables for E_p = 40 MeV are reported in (2000GA49, 2000GA59). A study of possible reasons for non-observation of certain ⁶Li excited states in the reaction is discussed in (1999TI07). ⁶Li*(3.56) decays by γ-emission consistent with M1; Γ_α/Γ < 0.025 [forbidden by spin and parity conservation]: see (1984AJ01). An analysis of the ⁹Be(p, α) cross section at E_p = 16 - 700 keV is described in (2001BA47). Astrophysical S-factor, analyzing powers and R-matrix parameters were deduced. At E_p = 9 MeV the yield of reaction (b) is dominated by FSI through ⁸Be*(0, 2.9) and ⁶Li*(2.19) with little or no yield from direct three-body decay: see (1979AJ01). More recent measurements of cross sections and/or polarization observables have been reported at E_p = 50 MeV (1989GU05), E_p = 25, 30 MeV (1992PE12; determined spectroscopic strengths), E_p = 40 MeV (1997FA17) [see also (1989FA1B)], E_p = 2 - 5 MeV (1988ABZW), E_p = 16 - 390 keV [deduced S(E)] (1997ZA06), E_p = 77 - 321 keV [deduced stellar reaction rates] (1998BR10), E_p = 30 - 300 keV (2000ISZZ). See also application-related experiments (1990RE09, 1995RI14). Analyses of data for this reaction have been reported for E_p = 45 - 50 MeV [DWBA] (1996YA09, 1997YAZV) and E_p < 2 MeV [analyzed reaction rates, primordial ⁶Li] (1997NO04). Reactions (b) and (c) at E_p = 58 MeV involve ⁶Li*(0, 2.19) (1985DE17). See also ¹⁰B in (1988AJ01) and (1985MAZG, 1986AN26, 1986KA26).

43. 9Be(d, 5He)6Li

Qm = -0.897

See ⁵He.

44. 9Be(t, 6He)6Li

Qm = -5.3830

Angular distributions of ⁶He_g.s. + ⁶Li_g.s. and ⁶He_g.s. + ⁶Li*(3.56) [both ions listed were detected] have been measured at E_t = 21.5 and 23.5 MeV. In the latter case the final state is composed of two isobaric analog states: angular distributions are symmetric about 90° cm, within the overall experimental errors. In the reaction leading to the ground states of ⁶He and ⁶Li differences from symmetry of as much as 40% are observed at forward angles. Angular distributions involving ⁶He_g.s. + ⁶Li*(2.19) and ⁶Li_g.s. + ⁶He*(1.8) have also been measured. This reaction appears to proceed predominantly by means of the direct pickup of a triton or ³He from ⁹Be. Differential cross sections are also reported at E_t = 17 MeV: see (1984AJ01) for references.

45. 9Be(3He, 6Li)6Li

Qm = -1.8938

Angular distributions of ⁶Li ions have been obtained at E(³He) = 6 to 10 MeV: see (1974AJ01). A study of the continuum suggests the population of ⁶Li states at E_x = 8 - 12, ≈ 21 and 21.5 MeV: see (1984AJ01). More recently, measurements at E(³He) = 60 MeV of differential cross sections have been reported (1990MA1O, 1990MAZG, 1995MA57). Spectroscopic factors were deduced. Angular distributions at E(³He) = 60 MeV for transition to the ⁶Li ground state and to ⁶Li*(3⁺, 2.185; 2⁺, 5.37; 1⁺, 5.65) were measured (1996RU13) and analyzed by coupled-channels methods.

46. 10B(n, 5He)6Li

Qm = -5.258

Differential cross sections are reported at E_n = 14.4 MeV involving ⁶Li*(2.19) and ⁵He_g.s. (1984TU02).

47. 10B(d, 6Li)6Li

Qm = -2.9861

Angular distributions involving ⁶Li*(0, 2.19) have been studied at E_d = 13.6 MeV (1983DO10) and at 19.5 MeV [see (1974AJ01)]. See also (1984SHZJ).

48. 10B(3He, 7Be)6Li

Qm = -2.8738

Angular distributions involving ⁶Li*(0, 2.19) have been measured at E(³He) = 30 MeV: see (1974AJ01).

49. 10B(α, 8Be)6Li

Qm = -4.5522

At E_α = 72.5 MeV only ⁶Li*(0, 2.19) are observed: the latter is excited much more strongly than is the ground state [S_α for the ground state is 0.4 that for ⁶Li*(2.19)]. The angular distributions for both transitions are flat: see (1979AJ01). See also (1984AJ01). A more recent measurement of differential cross sections at E_α = 27.2 MeV is reported in (1995FA21). Spectroscopic factors were deduced.

50. 11B(d, 7Li)6Li

Qm = -7.1903

See (1984AJ01).

51. 11B(3He, 8Be)6Li

Qm = 4.5712

Angular distributions are reported at E(³He) = 71.8 MeV involving several states in ⁸Be (1986JA02, 1986JA14).

52. 12C(p, 7Be)6Li

Qm = -22.5668

Angular distributions involving ⁷Be*(0, 0.43) have been measured at E_p = 40.3 MeV (1985DE05). For the earlier work at E_p = 30.6 to 56.8 MeV see (1974AJ01, 1979AJ01). See also references cited in (1988AJ01).

53. 12C(d, 8Be)6Li

Qm = -5.8922

Angular distributions involving states in ⁸Be have been studied at E_d = 19.5 and 51.8 MeV [see (1974AJ01)] and at 50 MeV (1985GO1G, 1989GO07, 1989GO26), 54.2 MeV (1984UM04) and 78 MeV (1986JA14), as well as at E_d = 18 and 22 MeV (1987TA07) and 51.7 MeV (1986YA12). See also (1984NE1A, 1987GO1S) and the DWBA calculations at E_d = 50 MeV (1988KA46) and E_d = 15 MeV (1988RA27).

54. 12C(3He, 9B)6Li

Qm = -11.5708

Angular distributions have been obtained at E(³He) = 28 to 40.7 MeV [see (1974AJ01)] and at E(³He) = 33 MeV (1989SI02), E(³He) = 33.4 MeV (1986CL1B; also A_y), E(³He) = 60 MeV (1990MAZG, 1993MA48), E(³He) = 30 - 60 MeV (1995MA57). See also (1989GL1D) and see ⁹B in (1988AJ01).

55. (a) 12C(α, 10B)6Li	Qm = -23.7122
(b) 12C(α, dα)10B	Qm = -25.1865

Angular distributions (reaction (a)) at E_α = 42 MeV involve ⁶Li*(0, 2.19): see (1974AJ01). Differential cross sections were measured at E_α = 90 MeV and cluster spectroscopic amplitudes were deduced (1991GL03). At E_α = 65 MeV reaction (b) goes via ⁶Li*(2.19, 4.31): see (1984AJ01). See also ¹⁰B in (1988AJ01) and (1987GA20).

56. (a) 12C(6Li, α)14N	Qm = 8.7980
(b) 12C(6Li, αd)12C	Qm = -1.4743

An analysis involving excited states of ⁶Li and ¹⁴N was applied to cross section and analyzing power data at E(⁶Li) = 33 MeV by (2000MA43).

Measurements of triple differential cross sections for elastic breakup of 156 MeV ⁶Li (reaction (b)) were reported in (1989HE28, 1989HE17, 1989RE1G). A diffraction dissociation model analysis was used. See also reaction 70. Partial cross sections for the ⁶Li + ¹²C reaction were measured for E(⁶Li) = 3.11 - 12.07 MeV by (1998MU12).

57. 12C(10B, 16O)6Li

Qm = 2.7015

See ¹⁶O in (1986AJ04).

58. 12C(11B, 6Li)17O

Qm = -4.609

Measurements of angular distributions at E(¹¹B) = 25, 35, 40 MeV have been reported by (1996JA12). Transfer mechanisms were studied.

59. 12C(12C, 12C)6Li6Li

Qm = -28.1726

The fragmentation of ¹²C into two ⁶Li ions has been observed at E(¹²C) = 2.1 GeV/A (1986LIZP).

60. 12C(14N, 20Ne)6Li

Qm = -4.1810

Angular distributions of reaction products were measured for E(¹⁴N) = 50 MeV, and multinucleon transfer mechanisms were studied (1992ARZX). See also the analysis for E(¹⁴N) = 54 MeV (1987GO12), and see ²⁰Ne in (1987AJ02, 1998TI06).

61. 13C(p, 8Be)6Li

Qm = -8.6140

See (1974AJ01).

62. 13C(t, 6Li)10Be

Qm = -8.6181

Measurements of differential cross sections and analyzing powers were reported by (1989SI02). Spectroscopic factors were extracted.

63. 13C(3He, 6Li)10B

Qm = -8.0809

Differential cross sections at E(³He) = 60 MeV have been reported (1990MAZG, 1995MA57). Cluster pick-up mechanisms were studied.

64. 16O(d, 12C)6Li

Qm = -5.6876

Angular distributions and polarization observables involving ⁶Li ions and several ¹²C states are reported at E_d = 22 MeV (1987TA07) and 51.7 MeV (1986YA12) and at E_d = 54.2 MeV (1984UM04). See also (1984NE1A), and ¹²C in (1990AJ01) for polarization studies.

65. 16O(3He, 6Li)13N

Qm = -9.2376

Measurements and analyses of differential cross sections at E(³He) = 30 - 60 MeV have been reported (1995MA57).

66. 19F(d, 6Li)15N

Qm = -2.5394

Differential cross sections at E_d = 50 MeV were reported (1990GO14).

67. 19F(3He, 16O)6Li

Qm = 4.0945

Angular distributions have been measured at E(³He) = 11 to 40.7 MeV involving ⁶Li*(0, 3.56) and various states of ¹⁶O: see (1974AJ01, 1977AJ02). Differential cross sections have been reported for E(³He) = 66 MeV (1991MA56).

68. 58Ni(6Li, d)X

Measurement of the tensor analyzing power made at E(⁶Li) = 34 MeV (1978VE03) were analyzed to obtain the D- and S-state ratio for the dα|⁶Li| bound state overlap.

69. 138Ba(6Li, 9Li)

Angular distributions measured for E(⁶Li) = 21 - 32 MeV are reported by (1999MA16).

70. (a) 208Pb(6Li, 6Li)208Pb
(b) 208Pb(6Li, αd)208Pb	Qm = -1.4743

For reaction (a) differential cross sections were measured at E(⁶Li) = 25 - 60 MeV and analyzed by the optical model (1994KE08, 1998KE03).

For reaction (b) measurements of triple differential cross sections for elastic breakup of 156 MeV ⁶Li were reported in (1989HE28, 1989HE17, 1989RE1G). Data were analyzed on the basis of a diffractive disintegration approach. Breakup measurements at E(⁶Li) = 60 MeV were reported in (1988HE16). See also reaction 56, and see the theoretical study of angular correlation of breakup fragments in (1989BA25).