A=7Li (1979AJ01)

Excitation functions and angular distributions have been studied for E_α = 0.5 to 1.9 MeV (1959HO03, 1961GR27). The cross section rises smoothly as expected for a direct capture process: at E_α = 1.32 MeV, σ = 3.58 ± 0.60 μb and the corresponding reduced cross section factor S = 0.064 ± 0.016 keV · b (1961GR27). Cross sections of (1961GR27) are 2 to 2.5 times higher than those of (1959HO03). See (1966LA04) for further comments.

2. ³H(α, n)⁶Li Q_m = -4.7839 E_b = 2.467

The cross section for this reaction has been measured for E_α = 11 to 18 MeV: the data show the effect of ⁷Li*(7.46) and indicate a broad resonance near E_α = 16.8 MeV [⁷Li*(9.6)]. The level parameters derived from this reaction and from reaction 3 (1967SP10) are displayed in Table 7.3 (in PDF or PS). The yield of ⁶Li ions at 0°(lab) has also been measured for E_α = 11.310 to 11.930 MeV with 2 - 3% accuracy: the data were then reduced to obtain the c.m. differential cross sections at 0° and 180° for the inverse reaction in the energy region corresponding to formation of ⁷Li*(7.46) (1977BR21). See also (1976HA1H, 1977BE1M; theor.) and (1975AL1A) for the breakup of ⁶Li.

3. ³H(α, α)³H E_b = 2.467

The elastic scattering has been studied for E_α = 3.6 to 18.2 MeV and E_t = 7.6 to 12 MeV. The excitation curves show the effects of ⁷Li*(4.63, 6.68, 7.46, 9.67). The derived level parameters are displayed in Table 7.3 (in PDF or PS) (1967SP10, 1968IV01). Angular distributions have been measured for E_α = 2.13 to 2.98 MeV (1971CH42) and E_t = 8.2 to 12 MeV (1975JA1D). Very accurate differential cross sections are reported by (1977BR21) for E_t = 8.507 to 9.050 and by (1975JA1D; abstract) for E_t = 7.6 to 10 MeV. Polarization measurements are reported for E_t = 6.0 to 12.3 MeV (1968KE03) and for E_{pol. t} = 10.2 to 11.7 MeV (1976HA17) and 12 to 17 MeV (1978CO1G). (1976HA17) find a polarization extremum (A_y = -1) near E_t = 11.1 MeV, θ_c.m. = 95° (1976HA17). See also (1974QU01, 1978BR1E) and (1974CL1D, 1974KO03, 1974TE05, 1975AB1C, 1975BA38, 1975CL1B, 1975HE07, 1975KU09, 1975NE1B, 1975PA1B, 1975TA1A, 1975WI1C, 1976HA1G, 1976HA1H, 1977BE50, 1977BE1M, 1978FR02, 1978LE1H; theor.).

4. ⁴He(α, p)⁷Li Q_m = -17.347

Angular distributions of the p₀ and p₁ groups are reported at E_α = 39.9 → 49.5 MeV (1977KI12) and 60.2, 92.4 and 140.0 MeV (1975KI14; p₀₊₁). See also (1974KO1C, 1975KI14; astrophysics) and ⁸Be.

5. ⁶He(p, t)⁴He Q_m = 7.509 E_b = 9.975

See (1971PO1A).

6. ⁶Li(n, γ)⁷Li Q_m = 7.251

Two γ-rays with E_γ = 7247 ± 2 and 6769 ± 2 keV are observed corresponding to transitions to ⁷Li*(0, 0.48) with branching ratios of (61 ± 3) and (39 ± 2)%. ⁷Li*(4.63) is not involved in the decay [≲ 2%] (1967TH05). See (1974AJ01) for the earlier work on Q₀, for an unpublished measurement of σ_n,γ, and for more accurate values of E_γ and branching ratios which have, however, not been published. See also (1974KR1B).

7. ⁶Li(n, n)⁶Li E_b = 7.251

The total cross section has been measured from E_n = 4 eV to 29 MeV: see (1976GAYV). Recent measurements include those of (1975HA1J, 1975HA1M: E_n = 10 eV to 10 MeV; preliminary) and (1976KN1C: E_n = 0.1 to 3.0 MeV; abstract). See also (1976BI1B). A pronounced resonance occurs at E_n = 244.5 ± 1.0 keV with a peak cross section of 11.20 ± 0.20 b (1977SM1B). [(1975HA1M) report σ_peak = 10.85 ± 0.10 b at 244.1 keV.] The elastic contribution is 7.2 b (1961LA1A): see Table 7.4 (in PDF or PS). No other clearly defined resonance is observed although the total cross section exhibits a broad maximum at E_n ≈ 5 MeV (1976GAYV). The analyzing power is nearly constant for E_n-bar = 2 to 5 MeV: a multi-level R-matrix analysis suggests a 3/2⁺ state at E_n = 2.8 MeV (Γ_n = 3.5 MeV) and a 3/2^- state at E_n = 3.5 MeV (Γ = 7.3 MeV) (1975HO01). The coherent scattering length (thermal, bound) is 1.8 ± 0.25i fm (1973MU14). The spin dependent capture cross section of slow neutrons (λ = 1.074 Å) is -1170 ± 50 b and the spin dependent scattering length is (-0.38 ± 0.05) × 10^-12 cm (1978GL01). For angular distributions see ⁶Li and (1974HY01: σ_el at 14.1 MeV).

The excitation function for 3.56 MeV γ-rays exhibits an anomaly, also seen in the (n, p) reaction (reaction 8). The data are well fitted assuming E_res = 3.50 and 4.60 MeV [E_x = 10.25 ± 0.10 and 11.19 ± 0.05 MeV], T = 1/2 and 3/2, Γ_c.m. = 1.40 ± 0.10 and 0.27 ± 0.05 MeV, respectively. Both states have J^π = 3/2^-. The reduced widths for the T = 3/2 state [⁷Li*(11.19)] are θ²_n = 2 × 10^-4, θ²_n'' = 0.16 [to ⁶Li*(3.56)] and θ²_p = 0.09 (1969PR04). However, an R-matrix study of ⁴He(t, t), ⁶Li(n, n), and ⁶Li(n, α) data leads to the identification of a 3/2^- state at E_x = 9.85 MeV, Γ = 1.2 MeV. The width of ⁷Li*(9.67) is 0.4 MeV and there is preliminary evidence for a 3/2⁺ state at 9.5 MeV, Γ = 3.7 MeV (G.M. Hale, private communication). A broad resonance is suggested at E_n = 11 MeV in elastic and inelastic differential cross sections. It would correspond to a state at E_x = 17 MeV (1977NEZX; abstract): see also reaction 3 in ⁷Be.

For other measurements see (1974AJ01). See also (1976KN1D, 1978LI1C), (1976LA1C) and (1974TE1B, 1976HA1G, 1977GU04, 1978MA37, 1978ST05; theor.).

8. ⁶Li(n, p)⁶He Q_m = -2.725 E_b = 7.251

The excitation function, measured from threshold to E_n = 8.9 MeV, exhibits an anomaly at E_n = 4.6 MeV (1969PR04). The excitation function, at forward angles, of p₀ is approximately constant for E_n = 4.4 to 7.25 MeV (1977RO01). See also ⁶He, (1977RI07: E_n = 800 MeV) and (1974BO1E, 1976GO12, 1976SL2A).

9. ⁶Li(n, d)⁵He Q_m = -2.37 E_b = 7.251

The excitation function, at forward angles, of deuterons increases monotonically for E_n = 5.4 to 6.8 MeV (1977RO02). See also (1976SL2A) and ⁵He.

10. ⁶Li(n, 2n)⁵Li Q_m = -5.66 E_b = 7.251

See (1974KO35, 1976GO12).

11. ⁶Li(n, α)³H Q_m = -4.7839 E_b = 7.251

The isotopic thermal cross section is 940 ± 4 b: see (1973MU14). Below 5 keV, the total cross section is given by σ = (149.5/√E(square root of E) (eV)) + 0.696 b (1970SO1A).

A resonance occurs at E_n = 245 keV, with σ_max = 3.0 ± 0.1 b (1974PO07), [E_n ≈ 240 keV, σ_max = 3.36 ± 0.06 b: see (1978RE1B)]. [From a study of the inverse reaction, (1977BR21) find σ_max = 3.15 b at E_n = 241 keV.] The resonance is formed by p-waves, J^π = 5/2^- and has a large neutron width and a small α-width: see Table 7.4 (in PDF or PS) (1959GA08). Above the resonance the cross section decreases monotonically to E_n = 18 MeV, except for a slight bump near E_n ≈ 1.8 MeV: see (1976GAYV, 1978SA19). An S-matrix analysis of the ⁶Li(n, t) reaction to 3.9 MeV suggests that the first 3/2^- excited state of ⁷Li is located at ≈ 8.87 MeV, Γ = 1.42 MeV (1978SA19): see, however, reaction 7. See also (1974LE30).

Angular distributions have been measured at many energies: see (1974AJ01) and (1974OV01: 0.1 to 1.8 MeV; also yield) and (1977RO01: 4.71 to 7.25 MeV; and excitation curve at 0° for E_n = 4.4 to 7.25 MeV). Cross-section measurements have been reported in abstracts or other preliminary forms by (1974CO1A: E_n = 1 to 500 keV), (1976LA1E: 3 to 600 keV), (1975FR1B, 1975FR1C: 3 to 1500 keV), (1976LAZU: 10 to 500 keV), (1974FO1B: 20 to 1700 keV), (1974PO1C: 30 to 600 keV), (1978RE1B: 80 to 470 keV), (1974ST1E, 1975ST1D, 1975ST1E: 964 keV), (1974BA1K, 1974BA1L, 1975BA1M: 2.2 to 9.7 MeV) and (1976BA1K: 10 to 14 MeV). See also (1975HO01).

(1976RA1D; preliminary results) have studied the (n, α)/(n, t) ratio at 0° and 180° for E_n = 0.5 eV to 25 keV. This ratio is not equal to 1 above 10 eV: it is suggested that the anisotropy arises from interference between the p-wave resonance at 0.25 MeV and the s-wave contributions which account for the large 1/v cross section for this reaction. See also (1975SC1G).

Polarization measurements are reported by (1977KA06) for E_n-bar= 0.2 to 2.4 MeV: the data suggest interference between s-waves and the p-wave resonance at 0.25 MeV. Interference between this 5/2^- state and a broad 3/2^- state 2 MeV higher also appears to contribute. At the higher energies A_y is close to +0.9 near 90° and varies slowly with E_n (1977KA06).

See also (1975SC1J), (1973LI1E, 1974ST1D, 1975HA1H, 1975TA1B, 1978BO1F, 1978PI1A; applied), (1974FO1C, 1974ST1F, 1974TS1A, 1976FO1C, 1976LI1H, 1976SL2A; reviews) and (1974HA1D, 1975HA1G, 1975HA1L, 1976HA1G, 1976HA1H, 1977GU04, 1977LO1C; theor.).

12. ⁶Li(p, π⁺)⁷Li Q_m = -133.099

At E_p = 600 MeV, the reaction preferentially excites ⁷Li*(4.63). ⁷Li*(0, 0.48, 6.68, 7.46) are also populated. Angular distributions have been obtained for the pions to ⁷Li*(0, 0.48, 4.63). The T = 3/2 state at E_x = 11.24 MeV is not observed [dσ/dΩ (10°) < 40 nb/sr] (1977BA37). See also (1977HO1B).
13. (a) ⁶Li(d, p)⁷Li Q_m = 5.026
(b) ⁶Li(d, np)⁶Li Q_m = -2.22463
(c) ⁶Li(d, pt)⁴He Q_m = 2.5592

Angular distributions of proton groups have been measured for E_d = 1 to 15 MeV [see (1966LA04, 1974AJ01)] and at E_d = 0.118 to 0.975 MeV (1977EL09.; p₀, p₁) and 0.49 to 3.44 MeV (1974MCZS, 1975MC02; p₀, p₁). In addition to ⁷Li*(0, 0.48) states with E_x = 4.630 ± 0.009 and 7.464 ± 0.010 MeV, Γ_c.m. = 93 ± 8 and 91 ± 8 keV are reported (1957BR97, 1960HA14). Ratios of observed θ²_n [see Table 7.3 (in PDF or PS) in (1966LA04)] are consistent with assignments ²²P to ⁷Li*(0, 0.48) and ²⁴P to ⁷Li*(7.46) (1960HA14, 1960MA32); S = 0.90 and 1.15 for ⁷Li*(0, 0.48) (1967SC29: DWBA analysis). ⁷Li*(0.48) has J = 1/2 since the angular correlation between p₁ and the 0.48 MeV γ-rays is isotropic: see (1955AJ61).

A kinematically complete study of reaction (b) at E_d = 10 MeV shows pronounced FSI via ⁷Li*(7.46) and possibly ⁷Li*(9.6) [Γ = 0.5 ± 0.1 MeV] (1971VO07). Reaction (c) strongly involves ⁷Li*(4.63, 7.46) (1977MI13; E_d = 7.5 → 10.5 MeV). See also (1974MI10). See also ⁸Be, (1977GL05, 1977TE1A) and (1975KU27, 1976KU07; theor.).

14. ⁶Li(t, d)⁷Li Q_m = 0.993

See (1974AJ01).

15. ⁶Li(α, ³He)⁷Li Q_m = -13.327

Not reported.

16. (a) ⁶Li(⁶Li, pα)⁷Li Q_m = 3.552
(b) ⁶Li(⁹Be, ⁸Be)⁷Li Q_m = 5.585

See ¹²C in (1975AJ02) for reaction (a) and reaction 34 in ⁸Be for reaction (b).

17. ⁷Li(γ, γ)⁷Li

See Table 7.4 (in PDF or PS) in (1966LA04) [summary of early measurements] for τ_m of ⁷Li*(0.48) = 0.107 ± 0.005 psec.

18. (a) ⁷Li(γ, n)⁶Li Q_m = -7.251
(b) ⁷Li(γ, 2n)⁵Li Q_m = -12.91
(c) ⁷Li(γ, p)⁶He Q_m = -9.975
(d) ⁷Li(γ, pn)⁵He Q_m = -11.84
(e) ⁷Li(γ, d)⁵He Q_m = -9.62
(f) ⁷Li(γ, t)⁴He Q_m = -2.467
(g) ⁷Li(γ, pt)³H Q_m = -22.281

The total photoneutron cross section rises sharply from 10 MeV to reach a broad plateau at about 15 mb from 14 to 20 MeV, decreases more slowly to about 0.5 mb at 25 MeV and then decreases further to about 0.3 mb at E_γ = 30 MeV (1976BE1H; monoenergetic photons): there are indications of weak structure throughout the entire region. See also (1975BE1F, 1975BE60). (1977FE05; bremsstrahlung) report differential cross sections for n₀₊₁, n₀ and n₁, for E_γ = 7 to 25 MeV. The integrated cross section to 23 MeV is 39 ± 4 MeV · mb for the n₀ transition and 17 ± 4 MeV · mb for the n₁ transition: together these account for 0.4 of the exchange augmented dipole sum of ⁷Li (1977FE05).

The cross section for the (γ, p) reaction (reaction (c)) shows a maximum at ≈ 15.6 MeV with a width of ≈ 4 MeV: see (1974AJ01). The total cross sections at E_γ = 60 and 80 MeV for the p₀₊₁ groups are, respectively, 43.8 ± 1.2 μb and 11.4 ± 0.4 μb. Angular distributions have also been measured (1976MA34). See also (1974DE52, 1974GO04, 1976MUZW) and ⁶He. For polarization of the protons see (1969AN20, 1970TO09).

Reaction (e) has been studied in the giant resonance reaction with E_bs ≲ 30 MeV. Deuteron groups to ⁵He_g.s. and possibly to the first excited state are reported. States of ⁷Li with E_x = 25 - 30 MeV may be involved when E_bs = 37 to 50 MeV is used (1975DE37).

A number of peaks have been reported in reaction (f): see Table 7.5 (in PDF or PS) in (1966LA04): see, however, (1977LE02). See also (1977JU1A). For reaction (g) see (1973KO30). (1974AH03, 1975AH06) have measured the total nuclear photon absorption cross section for natural Li from 10 to 210 MeV: some broad structures are observed. For pion production see (1974GO04, 1975AH06). See also (1974BU1A, 1975BR1F, 1977DA1B) and (1978OC1B; theor.).

19. (a) ⁷Li(e, e')⁷Li*
(b) ⁷Li(e, ep)⁶He Q_m = -9.975
(c) ⁷Li(e, et)⁴He Q_m = -2.467
(d) ⁷Li(e, eπ⁺)⁷He Q_m = -150.77

The electric form factor measurements for E_e = 100 to 600 MeV are well accounted for by a simple harmonic oscillator shell model with a quadrupole contribution described by an undeformed p-shell: R_rms = 2.39 ± 0.03 fm, |Q| = 42 ± 2.5 mb (1967SU1A). From results obtained for E_e = 24.14 to 97.19 MeV, R_rms = 2.35 ± 0.10 fm (model independent), 2.29 ± 0.04 fm (shell model) (1972BU01). A study of the ratio of the electric charge scattering from ⁶Li and from ⁷Li as a function of (momentum transfer)² yields < r² >^1/2₆/< r² >^1/2₇ = 1.001 ± 0.008. The rms radius of the ground state magnetization density distribution, < r² >^1/2_M = 2.98 ± 0.05 fm. From the ratio of transverse inelastic and elastic cross sections at 180°, B(M1↑; 0.48) = 2.50 ± 0.12 μ²_N. The cross section for the longitudinal excitation of ⁷Li*(0.48) has been found from the scattering through angles of 90° to 150°, B(C2↑; 0.48) = 7 ± 4 fm⁴. The harmonic oscillator length parameter of the 1p shell is found to be a_1p = 1.90 ± 0.03 fm (1971VA20).

The magnetic form factor has been measured for E_e = 70 to 200 MeV. The ratio of the magnetic octupole moment to the dipole moment Ω/μ = 2.30 ± 0.50 fm² (1966RA29).

Inelastic scattering studies show peaks corresponding to ⁷Li*(0, 0.48, 4.63, 6.68, 7.46, 11.24): see (1974AJ01) and Table 7.5 (in PDF or PS). At E_e = 700 MeV the proton separation spectra (reaction (b)) are similar to those observed in (p, 2p) (1978NA05). See also (1973AN31, 1973KU19). For reaction (c) see (1977LE02). For pion production (reaction (d)) see (1977SH1C).

See also (1973BI1A, 1974DE1E, 1975FA1A) and (1973GA19, 1973HO1A, 1974BE10, 1974GR24, 1974KU06, 1974NA23, 1975GR26, 1975JA1B, 1976DU05, 1977KU12; theor.).

20. (a) ⁷Li(n, n')⁷Li*
(b) ⁷Li(n, nt)⁴He Q_m = -2.467
(c) ⁷Li(n, nd)⁵He Q_m = -9.62

Angular distributions of neutron groups have been measured at E_n = 1.5 to 14 MeV [see (1966LA04, 1974AJ01)] and at E_n = 2.3 and 2.8 MeV (1978KN1D; n₀, n₁), 4.0 to 7.5 MeV (1976KN1D, 1976LA1C; n₀₊₁), 7 to 13 MeV (1976BI1B, 1976GL1A; n₀₊₁, n₂), 14.1 MeV (1974HY01; n₀₊₁, n₂; 1977HO31; n₀₊₁) and 14.6 MeV (1976MI1C; n₀₊₁). Reaction (b) at E_n = 14.4 MeV proceeds primarily via ⁷Li*(4.63) although some involvement of ⁷Li*(6.68) may also occur (1974AN02). See also (1976RI1A). For reaction (c) see (1978RI02) and reaction 12 in ⁶Li. See also ⁸Li, (1974TU1A, 1977KN1B) and (1977HO1A; theor.).

21. (a) ⁷Li(p, p')⁷Li*
(b) ⁷Li(p, 2p)⁶He Q_m = -9.975
(c) ⁷Li(p, pn)⁶Li Q_m = -7.251
(d) ⁷Li(p, pd)⁵He Q_m = -9.62
(e) ⁷Li(p, pα)³H Q_m = -2.467
(f) ⁷Li(p, p2d)³H Q_m = -26.295
(g) ⁷Li(p, d³He)³H Q_m = -20.820

Angular distributions of protons (reaction (a)) have been measured for E_p = 49.8 to 155 MeV [see (1974AJ01) - the listing in that review includes a number of unpublished references]. Inelastic proton groups have been observed corresponding to ⁷Li*(0.48, 4.63, 6.68, 7.46) [see (1952AJ38)] as well as to states at E_x = 5.5 ± 0.3 (Γ ≈ 0.4 MeV) and 9.6 ± 0.2 MeV (1965HA17). The width of ⁷Li*(6.7) is ≈ 1 MeV (1965HA17). τ_m(0.48) = 106 ± 14 fsec (1977PA11): see also Table 7.4 (in PDF or PS) in (1966LA04) and (1976DO10: 73 ± 6 fsec). Analysis of the 155 MeV data yields B(E2↑) = 10.5 ± 2, 28 ± 6 and 4.5 ± 2.3 fm⁴ for ⁷Li*(0.48, 4.63, 6.68); Γ(E2↓) = 0.43, 0.025 and 0.029 μeV (1965JA1A).

A comparison of σ_t for ⁷Li(p, p')⁷Li*(0.48) and ⁷Li(p, n)⁷Be*(0.43) has been carried out for E_p = 23 to 52 MeV: the spin-flip, isospin-flip part of the effective interaction is approximately independent of energy while the pure central part appears to decrease with increasing energy (1967LO07). See also (1974JA1F, 1975LE18, 1977ST04; theor.).

For reaction (b) see (1976BH02, 1977MC1F, 1977RO1E, 1978CH1H, 1978CH1K), (1975JA1B, 1975JA1C; theor.) and ⁶He. For reaction (c) see (1977WA05) and (1974AV02; theor.). For reactions (d, e, f) see (1974CH1J, 1975CH1B). See also (1975SA01; theor.). Reaction (e) proceeds sequentially via ⁷Li*(4.63, 6.68) (1970JA17). At E_p = 100 MeV, (1977RO02) find S_α = 0.94 ± 0.05, using a DWIA analysis. This value is very close to that predicted by simple LS coupling shell model predictions (1977RO02). See also (1975AN1D: E_p = 600 MeV) and (1975RO1B, 1978DE1J). Comparison of the data of reaction (g), at E_p = 100 MeV, with the (p, pα) work of (1977RO02) and DWIA indicates a dominance of the quasi-free reaction process p + α → d + ³He. The derived S_α, in this work, is 1.09 ± 0.11 (1977CO07).

22. ⁷Li(d, d')⁷Li*

Angular distributions have been reported for E_d = 11.8 to 28 MeV [see (1974AJ01)] and at E_d = 1.0 to 2.6 MeV (1974LO10: d₀) and 3 to 10 MeV (1976AB11; d₀). See also (1974CH58; theor.) and ⁹Be.

23. ⁷Li(³He, ³He)⁷Li

Angular distributions have been measured at E(³He) = 11 MeV (1970SC23; elastic). [Other papers quoted in (1974AJ01) have not been published.] At E(³He) = 37.5 MeV, the three-body final states which are most strongly populated are the ³He + α + t and ³He + d + ⁵He branches. Detection of ³He - t coincidences lead to a most probable momentum for the spectator α-particle of 60 MeV/c; the d - ³He breakup results suggest the unlikelihood of deuteron clusters in ⁷Li (1976WA12).

24. (a) ⁷Li(α, α')⁷Li*
(b) ⁷Li(α, 2α)³H Q_m = -2.467

Angular distributions (reaction (a)) have been reported for E_α = 3.6 to 29.4 MeV: see (1974AJ01). Reaction (b) has been studied at E_α = 25 to 64.3 MeV: see (1974AJ01) and (1974MA49). ⁷Li*(4.63) is strongly involved in the sequential decay. The population of ⁷Li*(7.46) is reported by (1970LA14). See also (1975GR41, 1975VO1B) and (1974BE1J, 1974KA32, 1974KU1A, 1975MI09, 1977BE51, 1977NI1A, 1977SA22; theor.).

25. ⁷Li(⁷Li, ⁷Li)⁷Li

The elastic angular distribution has been studied for E(⁷Li) = 4.0 to 6.5 MeV (1966PI02). See also (1978NO08).

26. ⁷Li(⁹Be, ⁹Be)⁷Li

The elastic angular distribution has been measured at E(⁷Li) = 34 MeV (1977KE09).

27. ⁷Li(¹⁰B, ¹⁰B)⁷Li

See ¹⁰B.

28. (a) ⁷Li(¹²C, ¹²C)⁷Li
(b) ⁷Li(¹³C, ¹³C)⁷Li

The elastic scattering has been studied at E(⁷Li-bar) = 9 MeV (1978DR07) and E(⁷Li) = 4.5 to 13 MeV (1976PO02), 20 MeV (1969BE90) [on ¹³C] and at 34 [¹³C] and 36 [¹²C] MeV (1973SC26). The inelastic scattering angular distributions involving ⁷Li*_0.48 + ¹²C_g.s. and ⁷Li*_0.48 + ¹²C*_4.43 have been measured at E(⁷Li) = 36 MeV (1973SC26). See also ¹²C in (1975AJ02) and ¹³C in (1976AJ04).

29. ⁷Li(¹⁶O, ¹⁶O)⁷Li

See Table 16.25 (in PDF or PS) in (1977AJ02) and (1976PO02: E(⁷Li) = 9.0 and 13.0 MeV).

30. ⁷Li(²⁰Ne, ²⁰Ne)⁷Li

The elastic angular distribution has been measured at E(⁷Li) = 36 MeV (1976CO23).

31. ⁷Be(ε)⁷Li Q_m = 0.862

The decay proceeds to the ground and 0.48 MeV states. The branching ratio to ⁷Li*(0.48) is (10.32 ± 0.16)% (1962TA11), (10.42 ± 0.18)% (1973PO10), (10.35 ± 0.8)% (1974GO26). The weighted mean of the half-life is 53.29 ± 0.07 d, including a recent value of 53.17 ± 0.07 d (1975LA16). See also (1974CR05). Both transitions are superallowed. log ft = 3.32 and 3.55 for the decays to ⁷Li*(0, 0.48) respectively (M.J. Martin, Nuclear Data Project, private communication).

The energy of the γ-ray is 477.593 ± 0.012 keV (1971HE20) [E_x = 477.611 ± 0.012 keV]. A measurement of the bremsstrahlung spectrum to ⁷Li*(0.48) measured in coincidence with the 478 keV γ-ray leads to a transition of energy of 388 ± 8 keV (1972PE05).

See also (1974SA1J), (1974AJ01), (1974VA1C, 1975UL1A; astrophys.) and (1974CH46, 1974KU06, 1975KR14, 1976KU07, 1977AZ02, 1978CH12, 1978SA18; theor.).

32. ⁹Be(γ, d)⁷Li Q_m = -16.696

See ⁹Be.

33. ⁹Be(π^-, 2n)⁷Li Q_m = 119.864

The capture of stopped pions has been studied in a kinematically complete experiment by (1977BA51): ⁷Li*(0, 0.48) are weakly populated. Two large peaks are attributed to the excitation of ⁷Li*(7.46, 10.25) [see, however, reaction 11]. The recoil momentum distributions corresponding to these peaks are rather similar and both indicate a strong L = 0 component (1977BA51).

34. ⁹Be(n, t)⁷Li Q_m = -10.439

Angular distributions of the t₀ and t₁ groups are reported at E_n = 13.99 MeV (1974PE06). See also (1976DI13, 1977RO01) and ¹⁰Be.

35. (a) ⁹Be(p, ³He)⁷Li Q_m = -11.202
(b) ⁹Be(p, pd)⁷Li Q_m = -16.696

At E_p = 43.7 MeV angular distributions have been obtained for the ³He particles corresponding to ⁷Li*(0, 0.48, 4.63, 7.46). The 7.46 MeV state is strongly excited while the mirror state in ⁷Be is not appreciably populated in the mirror reaction (see reaction 17 in ⁷Be). The angular distribution indicates that the transition to ⁷Li*(7.46) involves both L = 0 and 2, with a somewhat dominant L = 0 character (1966CE05). The J^π = 3/2^-, T = 3/2 state is located at E_x = 11.28 ± 0.04 MeV, Γ = 260 ± 50 keV (1967MC14). See also (1975HA1K) in reaction 17 in ⁷Be. For reaction (b) see ⁹Be.

36. (a) ⁹Be(d, α)⁷Li Q_m = 7.151
(b) ⁹Be(d, t)⁴He⁴He Q_m = 4.684

Angular distributions have been measured for E_d = 0.4 to 27.5 MeV [see (1966LA04, 1974AJ01)] and at E_d = 0.20 to 0.50 MeV (1973SZ07; α₀₊₁), 0.22 to 2.50 MeV (1974CH1L; α₀, α₁), 0.6 to 2.2 MeV (1974FR02; α₀, α₁), 0.9 to 2.5 MeV (1976BO45; α₀, α₁), 2.25 to 3.1 MeV (1977SL02; α₀, α₁) and 12.35 and 14.06 MeV (1978TA04; α₀, α₁, α₂, α₄). A study at E_d = 11 MeV finds Γ_c.m. = 93 ± 25 and 80 ± 20 keV, respectively, for ⁷Li*(4.63, 7.46). No evidence was observed for ⁷Li*(5.5, 8.6, 9.7, 12.5) or for the T = 3/2 state ⁷Li*(11.25) (1966HA09). In a kinematically complete study of reaction (b) at E_d = 26.3 MeV, ⁷Li*(4.6, 6.5 + 7.5, 9.4) are strongly excited. No sharp α-decaying states of ⁷Li are observed with 10 < E_x < 25 MeV. Parameters for ⁷Li*(9.7) are E_x = 9.36 ± 0.05 MeV, Γ = 0.8 ± 0.2 MeV (1973SO08). See also ⁸Be, ¹¹B in (1980AJ01) and (1974SO1C).

37. ⁹Be(t, ⁵He)⁷Li Q_m = 0.096

See (1975VO08).

38. ⁹Be(³He, αp)⁷Li Q_m = 1.657

See (1974AJ01).

39. (a) ⁹Be(⁶Li, ⁸Be)⁷Li Q_m = 5.585
(b) ⁹Be(⁶Li, 2α)⁷Li Q_m = 5.677

Angular distributions have been studied (reaction (a)) for E(⁶Li) = 5.5 and 6.5 MeV to ⁷Li*(0, 0.48) (1974VO06). See ¹¹B in (1975AJ02) for reaction (b).

40. ¹⁰Be(p, α)⁷Li Q_m = 2.563

See (1976EP1A; astrophysics).

41. (a) ¹⁰B(n, α)⁷Li Q_m = 2.790
(b) ¹⁰B(n, t)⁴He⁴He Q_m = 0.3233

Angular distributions have been studied at E_n = 0.2 to 1.25 MeV (1976SE06; α₀, α₁), 13.9 MeV (1978MO09; α₀₊₁, α₂) and 14.4 MeV (1969AN25; α₀₊₁, α₂). τ_m(0.48) = 92 ± 11 fsec (1967CA02). See also (1974ST1C, 1974TU1A, 1975LA08, 1978ST1H), ¹¹B in (1975AJ02) and (1974HA1D, 1975MU1A, 1978BI1E, 1978DU1E; applications).

42. ¹⁰B(α, ⁷Be)⁷Li Q_m = -16.202

See reaction 20 in ⁷Be.

43.¹¹B(γ, α)⁷Li Q_m = -8.665

See ¹¹B in (1975AJ02).

44. ¹¹B(p, pα)⁷Li Q_m = -8.665

See (1964BA1C).

45. (a) ¹¹B(α, 2α)⁷Li Q_m = -8.665
(b) ¹¹B(α, ⁸Be)⁷Li Q_m = -8.757

For reaction (a) see (1974AJ01). Angular distributions have been measured at E_α = 28.4 and 29.0 MeV (1968KA24: to ⁷Li*(0, 0.48) and ⁸Be*(0, 2.9)) and at 65 MeV (1976WO11: ⁷Li*(0, 4.63)). The angular distributions are quite featureless (1976WO11). At E_α = 65 and 72.5 MeV ⁷Li*(0, 4.64 ± 0.03) are very strongly populated while ⁷Li*(0.48, 6.68, 7.46) are weakly excited (1973WO06, 1974WO1C, 1976WO11). See also (1974WO1D) and (1973SC1B).

46. ¹¹B(d, ⁶Li)⁷Li Q_m = -7.192

At E_d = 19.5 MeV angular distributions have been measured for the transitions to ⁶Li(0) and ⁷Li*(0, 0.48) (1971GU07). See also (1974AJ01).

47. ¹¹B(¹⁶O, ²⁰Ne)⁷Li Q_m = -3.934

See reaction 4 in ²⁰Ne in (1978AJ03).

48. ¹²C(d, ⁷Be)⁷Li Q_m = -17.542

At E_d = 39.8 MeV, angular distributions have been measured for the transitions to ⁷Li(0) + ⁷Be(0), ⁷Li*(0.48) + ⁷Be(0), ⁷Li(0) + ⁷Be*(0.43), and ⁷Li*(0.48) + ⁷Be*(0.43). Asymmetries exceeding 20% are observed in the ratio of the cross sections to ⁷Li(0) and ⁷Be(0) (1971YO06). See also (1974VA1A).

49. ¹²C(³He, ⁸B)⁷Li Q_m = -22.899

See (1971DE37). See also (1975PA11; theor.).

50. ¹²C(⁶Li, ¹¹C)⁷Li Q_m = -11.471

At E(⁶Li) = 36 MeV, angular distributions have been obtained for the transitions involving ⁷Li_g.s. + ¹¹C_g.s. and ⁷Li*_0.48 + ¹¹C_g.s. (1973SC26).

51. ¹³C(p, ⁷Be)⁷Li Q_m = -20.264

At E_p = 45.0 MeV an angular distribution has been measured for the transition to ⁷Be(0) + ⁷Li(0) (1971BR07).

52. ¹³C(d, ⁸Be)⁷Li Q_m = -3.589

At E_d = 14.6 MeV, angular distributions are reported for the transitions to ⁸Be(0) and ⁷Li*(0, 0.48) (1967DE03).

53. ¹³C(⁶Li, ¹²C)⁷Li Q_m = 2.304

At E(⁶Li) = 34 MeV angular distributions have been measured for the transitions involving ⁷Li_g.s. + ¹²C_g.s., ⁷Li*_0.48 + ¹²C_g.s., ⁷Li_g.s. + ¹²C*_4.4, and ⁷Li*_0.48 + ¹²C*_4.4 (1973SC26).

54. ¹⁴N(n, 2α)⁷Li Q_m = -8.823

At E_n = 14.1 MeV, ⁷Li*(0, 0.48) are produced with about equal probability (1971SC16). At E_n = 18.2 MeV, ⁷Li*(4.63) may be involved (1976TU04, 1977TU1D).

55. ¹⁴N(⁶Li, ¹³N)⁷Li Q_m = -3.303

See reaction 38 in ¹³N in (1976AJ04).

56. ¹⁶O(α, ¹³N)⁷Li Q_m = -22.566

See reaction 45 in ¹³N in (1976AJ04).

57. ¹⁶O(⁶Li, ¹⁵O)⁷Li Q_m = -8.413

See reaction 30 in ¹⁵O in (1976AJ04).

58. (a) ¹⁷O(d, ¹²C)⁷Li Q_m = -2.582
(b) ¹⁸O(d, ¹³C)⁷Li Q_m = -5.680
(c) ¹⁹F(d, ¹⁴N)⁷Li Q_m = -6.123

At E_d = 14.6 to 15.0 MeV, angular distributions have been measured for the transitions to ¹²C(0) + ⁷Li*(0, 0.48) [reaction (a)], ¹³C(0) + ⁷Li*(0, 0.48) [reaction (b)] and ¹⁴N(0) + ⁷Li*(0, 0.48) [reaction (c)] (1967DE03).

59. ²³Na(e, e')⁷Li + ¹⁶O Q_m = -19.701

See (1978SA1F).