
^{6}Li (1988AJ01)(See Energy Level Diagrams for ^{6}Li) GENERAL: See also (1984AJ01) and Table 6.2 [Table of Energy Levels] (in PDF or PS). Shell model: (1983LE14, 1983VA31, 1984AS07, 1984PA08, 1984REZZ, 1984VA06, 1984ZW1A, 1985ER06, 1985FI1E, 1985LO1A, 1986AV08, 1986LE21, 1987KI1C, 1988WO04). Cluster and αparticle models: (1981PL1A, 1982WE15, 1983CA13, 1983DZ1A, 1983FO03, 1983GA12, 1983GO17, 1983SA39, 1983SM04, 1984BE37, 1984CO08, 1984DU17, 1984GL02, 1984JO1A, 1984KH05, 1984KR10, 1984KU03, 1984LA33, 1984MI1F, 1984PA08, 1984PL1A, 1984WA02, 1984WA1H, 1985BE60, 1985BO05, 1985BO11, 1985FI1E, 1985KH07, 1985KW02, 1985KW03, 1985LE08, 1985LI1F, 1985LO02, 1985ME02, 1985OS03, 1985SA1B, 1985ZH1A, 1986AV08, 1986BU07, 1986CHZX, 1986ESZY, 1986FI07, 1986GE05, 1986KR12, 1986KR1E, 1986KU08, 1986KU1F, 1986SA15, 1986SA1D, 1986SR02, 1986VA13, 1986VO09, 1987IM04, 1987KR07, 1987LE33, 1987LO16, 1987TA06, 1987ZH1E, 1988CH05, 1988CO1B, 1988FR1E, 1988KA1J, 1988KU1C, 1988US1A). Special states: (1981PL1A, 1983BI1C, 1983RO12, 1983VA31, 1984AS07, 1984DU17, 1984FI14, 1984FIZW, 1984OH01, 1984REZZ, 1984VA06, 1984WA02, 1984ZW1A, 1985AL12, 1985BA68, 1985BE60, 1985FI1E, 1985GO07, 1985KW03, 1985ME02, 1985MI10, 1985OS03, 1985PO09, 1985WI1A, 1985ZH1A, 1986AK1C, 1986BU07, 1986EL1A, 1986FI07, 1986GE05, 1986KU08, 1986SA15, 1986VA13, 1986VO09, 1987KI1C, 1987KO39, 1987KR07, 1987KUZI, 1987SV1A, 1987WA36, 1987ZH1E, 1988US1A). Electromagnetic transitions and giant resonances: (1983GM1A, 1984AS07, 1985FI1E, 1985GO23, 1985ME02, 1986AK1C, 1986ER1A, 1986FI07, 1986ME13, 1986SR02, 1986VA13, 1987KI1C, 1987KR07, 1987ZH1E). Astrophysical questions: (1982AU1A, 1982CA1A, 1982GR1A, 1982WA1B, 1984RA1E, 1984TR1C, 1985BO1E, 1985BO1K, 1985HO1A, 1985MI1E, 1985SC1C, 1985WA1K, 1986HU1D, 1986LA27, 1986RE1C, 1987AL1C, 1987AR1J, 1987AR1C, 1987AU1A, 1987HO1M, 1987MA2C, 1987PA1F, 1987RO25, 1988RE1B). Complex reactions involving ^{6}Li: (1983CH23, 1983GU1A, 1983GU1B, 1983KU1B, 1983MA53, 1983MU08, 1983NA08, 1983OL1A, 1983SA39, 1983ST1A, 1984BA1H, 1984BE1E, 1984CO08, 1984EC01, 1984EV1A, 1984GO03, 1984GR08, 1984HI1A, 1984KH05, 1984MO29, 1984NE1A, 1984RE14, 1984ST1B, 1984TS03, 1984UM04, 1985BO11, 1985FA02, 1985GL06, 1985GO20, 1985GU11, 1985JA18, 1985MA02, 1985MA13, 1985MO17, 1985MO24, 1985PO09, 1985ST1B, 1985WI1A, 1985WO11, 1986CH10, 1986CS1A, 1986HA1B, 1986JO1A, 1986KA1C, 1986KA1R, 1986LIZP, 1986ME06, 1986RA02, 1986SA1K, 1986SA1N, 1986SA30, 1986SAZJ, 1986SAZK, 1986SAZL, 1986SIZS, 1986SR02, 1986TA1G, 1986TA1M, 1986WE1C, 1986XU1B, 1986YA1L, 1987AR19, 1987AU1C, 1987BA38, 1987BA39, 1987BL13, 1987BL1K, 1987CH08, 1987CH26, 1987CH33, 1987CH32, 1987DE37, 1987DO13, 1987DU07, 1987FA01, 1987FA02, 1987FE1A, 1987FR1G, 1987GE1B, 1987GL05, 1987GR11, 1987HA45, 1987JA06, 1987JE03, 1987KO15, 1987LY04, 1987LY1D, 1987NA01, 1987PO23, 1987RO10, 1987SA21, 1987TAZU, 1987TR05, 1987VE1D, 1987WA09, 1987YA16, 1988BE09, 1988BL09, 1988CA06, 1988CEZZ, 1988FR1B, 1988FR1F, 1988GO1H, 1988KI05, 1988RU01, 1988SA19, 1988SH1E, 1988ST06, 1988TA1A, 1988TS03, 1988VA1E, 1988WO10). Polarization of ^{6}Li (See also "Complex reactions" and "Applications"): (1984JO1A, 1984NI01, 1986CH1Q, 1986SA15, 1986TA1G, 1987FI1D, 1988FR1E). Applications: (1983AM1A, 1983AS03, 1986AU1A, 1986CL1C, 1986EN1A, 1986FI1D, 1986MA1S, 1986SA1M, 1986ST1E, 1986SU1K, 1986ZA1C, 1987DO07). Muon and neutrino capture and reactions: (1983GM1A, 1983GU10, 1983JU01, 1983MI14, 1984RO1B, 1984WA1J, 1987KU23, 1987SU06). Reactions involving pions, other mesons and baryon states (See also reactions 3, 13, 29 and 30): (1982BE1D, 1982RA28, 1983AB1B, 1983AS1B, 1983BA26, 1983BA1A, 1983BA1G, 1983DZ1A, 1983FE07, 1983GE12, 1983GM1A, 1983HE17, 1983LO10, 1983PO1D, 1984ABZY, 1984BA1U, 1984BO1H, 1984BR22, 1984EF03, 1984GE1B, 1984GL02, 1984GL09, 1984JI03, 1984KO16, 1984KR10, 1984KU13, 1984MO09, 1984MO1H, 1984NA1D, 1984RE1C, 1984TR1B, 1984ZA1A, 1985BE1C, 1985CA1B, 1985DO19, 1985ER06, 1985LA20, 1985MA1G, 1985MO1F, 1985RE1B, 1985RO17, 1985ST1A, 1986AK1A, 1986AS1A, 1986BA1W, 1986CE04, 1986CH1I, 1986ER1A, 1986FI1A, 1986GE05, 1986HA1L, 1986HU1B, 1986PE05, 1986RA1J, 1986RO03, 1986SH14, 1986SZ1A, 1986WH01, 1986YO06, 1986ZO1A, 1987BE2A, 1987BO1P, 1987BU20, 1987CH10, 1987GM02, 1987GM04, 1987HA40, 1987JA1C, 1987LE1E, 1987LE1B, 1987MA1I, 1987NA04, 1987PO1H, 1987RA1I, 1987SE1C, 1987WE1A, 1987YO01, 1988BA1F, 1988BA1G, 1988FR1E, 1988GA1A, 1988GIZT, 1988GIZU, 1988KA1J, 1988ROZZ). Reactions involving antiprotons: (1984GU06, 1985DU05, 1985LE1B, 1986DU10, 1986KO1E, 1987AS06, 1987GR1I, 1987PO05). Hypernuclei: (1982KA1D, 1982MO1B, 1983FE07, 1983MA1F, 1983MO1C, 1983PO1D, 1983SH38, 1984BO1H, 1984HA1D, 1984MA1G, 1984MO09, 1985MO1F, 1986BA1W, 1986ER1A, 1986HU1B, 1986MA1C, 1986SZ1A, 1987PO1H, 1988BA1F, 1988BA1G, 1988GA1A, 1988HA44). Other topics: (1983BI1C, 1983FO03, 1983RO12, 1984FI14, 1984NA19, 1984OH01, 1985AN28, 1985GO07, 1985GO23, 1985MI10, 1985PO09, 1986KO1N, 1986KU1F, 1986MA1X, 1987AJ1A, 1987SV1A, 1988HA1K). Groundstate properties of ^{6}Li: (1983ANZQ, 1983FO03, 1983GR26, 1983KU06, 1983LE14, 1983VA31, 1984BE37, 1984BR25, 1984DU17, 1984GE05, 1984GL02, 1984KO1H, 1984KU03, 1984KU06, 1984MI1A, 1984MI1F, 1984MIZM, 1984NI01, 1984OH01, 1984PA08, 1985AL12, 1985AN28, 1985BE60, 1985BO05, , 1985CL1A, 1985FI1E, 1985HA18, 1985KH07, 1985LO1A, 1985ME02, 1985SA32, 1985SH1A, 1985WI1A, 1985ZH1A, 1985ZI05, 1986ESZY, 1986GL1A, 1986KO1U, 1986KU08, 1986LA27, 1986LE21, 1986ME13, 1986OS07, 1986RO03, 1986SY1A, 1986VO09, 1987HA34, 1987KI1C, 1987KR07, 1987LE1C, 1987LO16, 1987SV1A, 1988CH05, 1988CO1B, 1988POZS, 1988VA03, 1988WO04).
Q = 0.83 mb (1984SU09). The interaction nuclear radius of ^{6}Li is 2.09 ± 0.02 fm (1985TA18) [see also for derived matter, charge and neutron matter rms radii]. Isotopic abundance: (7.5 ± 0.2)% (1984DE53). See also (1987LA1J, 1988LA1C). For estimates of the parityviolating αdecay width of ^{6}Li*(3.56) [0^{+}; T = 1] see (1983RO12, 1984BU01, 1986BU07).
Capture γrays (reaction (a)) to the first three states of ^{6}Li [γ_{0}, γ_{1}, γ_{2}] have been observed for E(^{3}He) = 0.5 to 25.8 MeV, while the yields of γ_{3} and γ_{4} have been measured for E(^{3}He) = 12.6 to 25.8 MeV. The γ_{2} excitation function does not show resonance structure. However, the γ_{0}, γ_{1}, γ_{3} and γ_{4} yields do show broad maxima at E(^{3}He) = 5.0 ± 0.4 [γ_{0}, γ_{1}], 20.6 ± 0.4 [γ_{1}], ≈ 21 [γ_{3}] and 21.8 ± 0.8 [γ_{4}] MeV. The magnitude of the groundstatecapture cross section is well accounted for by a directcapture model; that for the γ_{1} capture indicates a nondirect contribution above E(^{3}He) = 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 γ_{4} 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 ^{3}He + t parentage, θ_{0}^{2} = 0.8 ± 0.2 and θ_{1}^{2} = 0.6 ± 0.3: see (1974AJ01). See also (1985MOZZ, 1986MOZQ, 1987MO1I; theor.). The angular distribution and polarization of the neutrons in reaction (b) have been measured at E(^{3}He) = 2.70 and 3.55 MeV. The excitation function for E(^{3}He) = 0.7 to 3.8 MeV decreases monotonically with energy. The excitation function for n_{0} has been measured for E(^{3}He) = 2 to 6 MeV and for E(^{3}He) = 14 to 26 MeV; evidence for a broad structure at E(^{3}He) = 20.5 ± 0.8 MeV is reported [^{6}Li*(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(^{3}He) = 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. ^{3}He) = 18.0 and 33.0 MeV (1986RA1C). See also (1986KO1K) and (1985CA41). Elastic scattering (reaction (d)) angular distributions have been measured at E(^{3}He) = 5.00 to 32.3 MeV and excitation functions have been reported for E(^{3}He) = 4.3 to 33.4 MeV: see (1979AJ01). At the lower energies the elastic yield is structureless and decreases monotonically with energy. Polarization measurements are 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. A phaseshift analysis [single level Rmatrix formalism, L ≤ 4] yields Pstates [0^{}, 2^{}; T = 1] at E_{x} ≈ 21.5 and 21.0 MeV and Fstates [3^{}, 4^{}; T = 1] at E_{x} ≈ 26.7 and 25.7 MeV. There is some indication also of T = 0, 3^{}, 5^{} and 3^{+} states at E_{x} ≈ 25, 29.5 and 31.5 MeV whose decay is presumably primarily by d + α: see (1979AJ01). For other channels see (1984AJ01). See also (1984KR1B; theor.).
^{6}Li*(0, 2.19) have been populated: see (1974AJ01). See also ^{7}Li, (1983CO1E) and (1983FU11; theor.).
Differential cross sections are reported for the transitions to ^{6}Li*(0, 2.19) for E(^{3}He) = 350, 420, 500 and 600 MeV (1983LE26). See also (1984AJ01), (1983BR31, 1983JA13) and (1984GE05; theor.).
No resonance has been observed corresponding to formation of ^{6}Li*(3.56) [0^{+}; T = 1]: the parityforbidden Γ_{α} ≤ 6 × 10^{7} eV (1984RO04). See also Table 6.2 (in PDF or PS). The cross section for the capture cross section has been measured for E_{α} = 3 to 25 MeV by detecting the recoiling ^{6}Li ions: the direct capture is overwhelmingly E2 with a small E1 contribution. The spectroscopic overlap between the ^{6}Li_{g.s.} and α + d is 0.85 ± 0.04: see (1984AJ01). See also (1982KI11), (1985CA41, 1986LA22, 1986LA27) and (1984AK01, 1985AK1B, 1986AK1C, 1986BA1R; theor.).
Reaction (a) has been studied to E_{α} = 165 MeV and to E_{d} = 21.0 MeV: see (1979AJ01, 1984AJ01). Recent measurements are reported at E_{pol. d} = 5.4, 6.0 and 6.8 MeV (1985LU08; VAP, TAP), 6 to 11 MeV (1985OS02; VAP), 10.05 MeV (1983BR23; VAP, TAP) and 12.0 and 21.0 MeV (1983IS10; VAP, TAP) and at E_{α} = 11.3 MeV (1987BR07). It is clear that Coulomb effects need to be taken into account to understand the data. See also (1986DO1K). (1986BR1N, 1986VUZZ, 1986VU1B, 1987VU1A; prelim.) have measured VAP and TAP at E_{pol. d} = 35 and 45 MeV in reaction (b). See also (1987GAZZ). For the earlier work, and for the other breakup channels, see (1974AJ01, 1979AJ01, 1984AJ01). See also (1988PUZZ) and (1983BA42, 1985DO03, 1986KO1J, 1987KA1M, 1987KUZI, 1987MI06, 1988KA1J, theor.).
Elastic differential crosssection and polarization measurements have been carried out up to E_{α} = 166 MeV and E_{d} = 45 MeV: see (1974AJ01, 1979AJ01, 1984AJ01). Recent measurements are reported at E_{d} = 0.87 to 1.43 MeV (1984BA19, 1985BAYZ; prelim.), at E_{pol. d} = 11.9 MeV (1988EL01; TAP), 21 MeV (see 1986MI1E; VAP, TAP), 24.0 and 38.2 MeV (1986GR1D; TAP; prelim.), 31.8 to 39.0 MeV (1986KO1M; TAP; prelim.), 56 MeV (1985NI01; VAP, TAP) and at E_{α} = 7.0 GeV/c (1984SA39). For a study of the inclusive inelastic scattering at E_{α} = 7.0 GeV/c see (1987BA13). Phaseshift 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 Table 6.3 (in PDF or PS). It is found that the dwave shifts are split and exhibit resonances at E_{x} = 2.19 (^{3}D_{3}), 4.7 (^{3}D_{2}) and 5.65 MeV (^{3}D_{1}). (1983JE03) suggest very broad G_{3} and G_{4} resonances at E_{d} = (19.3) and 33 MeV, a D_{3} resonance at 22 MeV and F_{3} and F_{2} 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 ^{6}Li states is discussed by (1985JE04). For a discussion of the Mmatrix see (1988EL01). For recent work on (α + d) correlations involving ^{6}Li*(0, 2.19, 4.31 + 5.65) see (1987CH08, 1987CH33, 1987PO03) and (1987FO08). See also (1984AJ01, 1984PL1A, 1987GR08) and (1983HAYX, 1983SA39, 1983SU1B, 1984KA1E, 1984LO1C, 1984SC1A, 1984WA1H, 1985FI01, 1985FR1F, 1985HA04, 1985KA20, 1985LI1F, 1985MI1F, 1985SA1B, 1985ZH1A, 1986BO01, 1986FI07, 1986FR12, 1986KO1J, 1986MI1D, 1986MI1E, 1986SA1D, 1987HA34, 1987KU1G, 1987LE1C, 1987MI06, 1987PR08, 1987SA1C, 1988BR1E, 1988BU1G, 1988KA1J, 1988VA18; theor.).
Angular distributions have been measured at E(^{3}He) = 8 to 18 MeV and E_{α} = 42, 71.7 and 81.4 MeV: see (1974AJ01). At E_{α} = 28, 63.7, 71.7 and 81.4 MeV the αspectra show that the sequential decay (reaction (b)) involves ^{6}Li*(2.19) and possibly ^{5}Li: see (1979AJ01).
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 ^{6}Li (and ^{7}Li) synthesis above E_{α} = 250 MeV (1985WO11) [and see for additional comments on astrophysical problems]. For reaction (c) [and excited states of ^{4}He] see (1984AJ01): ^{6}Li*(2.19) is involved in the process.
See reaction 1 in ^{6}He.
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 ^{5}He. The cross section for reaction (c) is ≤ 5 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_{bs} = 67 MeV). The 90° differential cross section for reaction (d) decreases monotonically for E_{γ} = 18 to 70 MeV: reaction (d) contributes ≈ 1/3 of the total cross section for ^{6}Li + γ, consistent with a ^{3}H + ^{3}He cluster description of ^{6}Li_{g.s.} with θ^{2} ≈ 0.68. The agreement with the inverse reaction, ^{3}H(^{3}He, γ) [see reaction 1] 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). See also (1987GA22, 1987LI32, 1987PI06) and (1983BU1A, 1984BU1C, 1984IR1A, 1985LO02, 1985KO22, 1985VA1C, 1986AH03, 1986AK1B, 1986AV06, 1987BA2C, 1987BU04, 1987DU09, 1987LU1B, 1988BU1D; theor.).
The width, Γ_{γ}, of ^{6}Li*(3.56) = 8.1 ± 0.5 eV: see (1974AJ01) and Table 6.4 (in PDF or PS) in (1979AJ01); E_{x} = 3562.88 ± 0.10 keV: see (1984AJ01). See also (1987PI06).
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 αd cluster in which the deuteron cluster is deformed and aligned. The groundstate M1 current density has also been calculated (1982BE11). A modelindependent analysis of the elastic scattering yields r_{rms} = 2.51 ± 0.10 fm. See also the discussion in (1984DO20). Table 6.4 (in PDF or PS) here and Table 6.4 (in PDF or PS) in (1984AJ01) summarize the results obtained in the inelastic scattering of electrons. Form factors have been measured for ^{6}Li*(2.19, 3.56, 5.37) as well as for the t + ^{3}He continuum up to 4 MeV above threshold [no narrow structures corresponding to ^{6}Li states are observed]: see (1984AJ01). For reaction (b) see ^{5}He and (1987VA08) and (1987VA1N). Angular distributions for the d_{0} group in the (e, d_{0}) reaction have been measured for E_{x} = 10 to 28 MeV. The deduced E1 and E2 components of the (γ, d_{0}) cross section show no structure. The E1 strength implies nonnegligible isospin mixing in this energy region (1986TA06). At E_{e} = 480 MeV (reaction (c)) the αd momentum distribution in the ground state of ^{6}Li has been studied. The results are well accounted for by an αNN model. The αd probability in the ground state of ^{6}Li is 0.73 [estimated ± 0.1]. The data are consistent with the expected 2S character of the αd relative wave function (1986EN05). See also (1986EV1A). π^{0} production involving ^{6}Li*(2.19, 3.56, 5.37) is reported at E_{e} = 500 MeV (1987NA1I; prelim.). For the earlier work see (1979AJ01, 1984AJ01). See also (1986BA85), (1986PE05, 1987DE43) and (1983RE15, 1983SA39, 1984CH20, 1984CO08, 1984KO16, 1984KR10, 1984KU03, 1984PA08, 1984YP01, 1984ZH1A, 1985CH01, 1985ER06, 1985KH07, 1985LO1A, 1986AK1A, 1986AZ01, 1986BE1L, 1986CHZX, 1986DO11, 1986KE1F, 1986KR12, 1986KR1E, 1986RE1D, 1986SA1D, 1987KR07, 1987LE1C, 1987LO16, 1987SA1C, 1988CH1D, 1988KU1C; theor.).
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 ^{6}Li*(2.19)). Differential cross sections are also reported for E_{π+} = 100 to 260 MeV to ^{6}Li*(0, 2.19, 3.56, 4.25). The excitation function for the unnaturalparity transition to ^{6}Li*(3.56) has an anomalous energy dependence (1984KI16). For reaction (b) see (1987HU02) and for reaction (c) see (1983BA26, 1983LO10, 1985MC05, 1986MC11). For a study of reaction (d) at E_{π+} = 130 MeV see (1987HU13). For the (π^{+}, 2p) reaction at E_{π+} = 59.4 MeV to states in ^{4}He see (1986RI01). See also the "GENERAL" section here.
Angular distributions involving the groups to ^{6}Li*(0, 2.19) have been reported at E_{n} = 1.0 to 14.6 MeV [see (1984AJ01)] and at 4.2, 5.4 and 14.2 MeV (1985CH37; n_{0}, n_{1}), 7.5 to 14 MeV (1983DA22; n_{0}), 8.9 MeV (1984FE1A; n_{0}), 8.0 and 24 MeV (1986HAZR; n_{0}, n_{1}) and at E_{pol. n} = 5 to 17 MeV (1986PF1A; prelim.; n_{0}). For reaction (b) see (1985CH37, 1984AJ01). See also ^{7}Li, (1987SC08) and (1984UD1A, 1985HO1E, 1985LI1F, 1986BE1L; theor.).
Proton angular distributions have been measured for E_{p} = 0.5 to 800 MeV [p_{0}, p_{1}, p_{2}, p_{3}] [see (1966LA04, 1974AJ01, 1984AJ01)] and at E_{pol. p} = 5 to 17 MeV (1986PF1A; prelim.; p_{0}). Doubledifferential cross sections for the continuum yield [E_{x} = 1.5  3.5 MeV] are reported at E_{p} = 65 MeV (1987TO06; prelim.). See also (1983GLZZ, 1983PO1B, 1983POZX). For a summary of the results on excited states see Table 6.5 (in PDF or PS). Reaction (b) has recently been studied at 70 MeV (1983GO06), at 50  100 MeV (1984PA1B, 1985PA1B; prelim.) and 1 GeV (1985BE30): see ^{5}He 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 ^{6}Li*(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 ^{6}Li_{g.s.} are deduced to be 0.76 [at 119.6 MeV] and 0.84 [at 200.2 MeV] using DWIA and a boundstate WoodsSaxon 2S wave function (1984WA09, 1985WA25). Work on reaction (d) has suggested that the ^{3}He + t parentage of ^{6}Li is comparable with the α + d parentage: see (1984AJ01). See also (1985PAZL). For reaction (e) see ^{5}Li, ^{6}Be and (1985BE30). The (p, 3p) reaction has been studied by (1984NA17). For antiproton studies see (1987AS06) and the "GENERAL" section here. See also (1984AJ01) for the earlier work and ^{7}Be, (1983AN18, 1986SA1Q, 1987GAZM, 1987SA46, 1988MIZX), (1984LA33, 1985AL16, 1986CH1J, 1986WA11, 1987LE33) and (1982CH28, 1983GO17, 1983KA1A, 1983SM04, 1984GU14, 1984KO1E, 1984KU03, 1984KU06, 1984MU01, 1985BE60, 1985DO16, 1985KA1D, 1985PA03, 1986CHZX, 1986IM1A, 1986IM01, 1986OS08, 1986VL1A, 1986ZH03, 1987FA1H, 1987HA01, 1987IM1F, 1987IM04, 1987VD01, 1987ZH1D, 1988CH06, 1988VD1A; theor.).
Angular distributions of deuterons have been measured at E_{d} = 4.5 to 19.6 MeV [see (1979AJ01)] and at 50 MeV (1988KO1C; prelim.). The T = 1, 0^{+} state, ^{6}Li*(3.56) is not appreciably populated. For a summary of the results on excited states see Table 6.5 (in PDF or PS). At E_{d} = 21 MeV reaction (b) shows spectral peaking (characteristic of ^{1}S_{0} for the pn system [T = 1]) when ^{6}Li*(3.56) is formed, in contrast with the much broader shape (characteristic of ^{3}S_{1}) seen when ^{6}Li*(0, 2.19) are populated. A study of reaction (c) at E_{d} = 52 MeV shows that the αclustering probability, N_{eff} = 0.12^{+0.12}_{0.06} if a Hankel function is used. The αparticle and the deuteron clusters in ^{6}Li have essentially a relative orbital momentum of l = 0. The Dstate probability of the ground state of ^{6}Li is ≈ 5% of the Sstate. Quasifree scattering is an important process even for E_{d} = 6 to 11 MeV. Interference effects are evident in reaction (c) proceeding through ^{6}Li*(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 threebody breakup of ^{6}Li at these low energies is dominated by sequential decay processes. See (1979AJ01) for references. See also ^{8}Be, (1987AL23) and (1982CH28, 1983GO24, 1983LY04, 1984BL21, 1984KU15, 1985LI1C, 1986AV01; theor.).
At E_{t} = 17 MeV angular distributions have been measured for the tritons to ^{6}Li*(0, 3.56): see (1979AJ01).
Angular distributions have been measured at E(^{3}He) = 8 to 217 MeV [see (1979AJ01, 1984AJ01)] and at 34, 50, 60 and 72 MeV (1986BR31; elastic). For reaction (b) see ^{5}Li, (1984AR17, 1987ZA07). See also ^{9}B.
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 (1987BU27, 1986ROZK). See also ^{10}B. 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 ^{6}Li_{ g.s.}, n_{eff} = 0.98 ± 0.05. The results are very model dependent: see (1984AJ01). At E_{α} = 27.2 MeV ^{6}Li*(2.19) is very strongly populated (1985KO29). See also (1982CH28, 1983AV02, 1983BE51, 1983BU15, 1985BE60, 1986GA1F, 1986ZE01, 1987KO1L, 1988LE06; theor.).
Angular distributions of ^{6}Li ions have been studied for E(^{6}Li) = 3.2 to 36 MeV [see (1974AJ01, 1979AJ01, 1984AJ01)] and at E(^{6}Li) = 2.0 to 5.5 MeV (1983NO08) and 156 MeV (1985SA36; ^{6}Li*(0, 2.19)), (1985MI05; elastic; ^{6}Li*(2.19, 3.56) are also populated), (1987EY01; several states in ^{12}C). Reaction (b) has been studied for E(^{6}Li) = 36 to 47 MeV: enhancements in yield, due to double spectator poles, have been observed in dd and αα but not in αd double coincidence spectra. The widths of the peaks are smaller than those predicted from the momentum distribution of α + d clusters in ^{6}Li. ^{6}Li*(2.19) was also populated. See references in (1984AJ01). Recent work on reaction (b) is reported by (1984LA19: 2.4 and 4.2 MeV) and by (1985NO1A). For reaction (c) see (1987LA25). See also ^{12}C in (1985AJ01), (1983CH59) and (1984CH1E, 1986KA1B, 1986SA1D, 1987AR13, 1987SA1C; theor.).
Angular distributions have been measured at E(^{7}Li) = 78 MeV to ^{6}Li*(0, 2.19) (1986GLZU; prelim.).
The elastic scattering has been studied at E(^{6}Li) = 4.0, 6.0 and 24 MeV [see (1979AJ01)], at 32 MeV (1985CO09) and at 50 MeV (1988TRZY; prelim.; also inelastic). For the interaction cross section at E(^{6}Li) = 790 MeV/A see (1985TA18).
The elastic scattering has been studied at E(^{6}Li) = 5.8 and 30 MeV: see (1979AJ01).
The elastic scattering (reaction (a)) has been studied at E(^{6}Li) = 4.5 to 156 MeV [see (1984AJ01)] and at E(^{6}Li) = 19.2 MeV (1983RU09), 36 and 45 MeV [and E(^{12}C) = 72 and 90 MeV] (1984VI02, 1985VI03; also to ^{6}Li*(2.19, 4.31) and to various states of ^{12}C), 90 MeV (1987DE02; also to various states of ^{12}C), 123.5 and 168.6 MeV (1988KA09; and to various states of ^{12}C), 150 MeV (1987TA21; also VAP), 156 MeV (1987EY01; and to various states in ^{12}C) and at 210 MeV (1988NA02). See also (1986SHZP, 1987PA12). At E(^{6}Li) = 34 MeV the dα angular correlations involve ^{6}Li*(0, 2.19) (1985CU04). See also ^{12}C in (1985AJ01, 1990AJ01). For pion production see (1984CH16). For the interaction cross section at E(^{6}Li) = 790 MeV/A see (1985TA18). For VAP measurements at E(pol. ^{6}Li) = 30 MeV see (1988VAZY). The elastic scattering (reaction (b)) has been studied for E(^{7}Li) = 5.8 to 40 MeV: see (1984AJ01). The elastic scattering (reaction (c)) has been measured for E(^{6}Li) = 93 MeV (1987DE02). See also ^{18}F and ^{19}F in (1987AJ02), (1986MCZZ, 1988MCZY), (1983BI13, 1984HA53) and (1982GU21, 1983BU15, 1983DE48, 1983OS03, 1983SH24, 1984BR08, 1984GR05, 1984MU1D, 1984SA1B, 1985CO21, 1985SH1A, 1986BE45, 1986IO01, 1986KA1B, 1986MI24, 1986SA1D, 1986SAZJ, 1986SAZK, 1986SAZL, 1987AR13, 1987KA1I, 1987SA1C, 1987SA21, 1988DEZU, 1988DE1F, 1988SA15; theor.).
Elastic angular distributions have been reported at E(^{6}Li) = 4.5 to 50.6 MeV [see (1984AJ01)], at E(^{6}Li) = 35.3 and E(^{16}O) = 94.2 MeV (1984VI02) and at 50 MeV (1988TRZY; prelim.; also inelastic). At E(^{6}Li) = 25.7 and E(^{16}O) = 68.6 MeV (1985VI03, 1984VI01) report some σ(θ) to ^{6}Li*(2.19) [and to ^{16}O*(6.13)]. See (1985VI03, 1986SC28) for studies of the breakup. The VAP has been measured at E(^{6}Li) = 25.7 MeV, and also using ^{16}O ions (1987VAZY; prelim.). For fusion cross sections see (1986MA19). See also ^{16}O in (1986AJ04), (1986MO1E, 1987PA12) and (1983BU15, 1983JO1A, 1984WI08, 1985CO21, 1985SA13, 1986SAZS; theor.).
The elastic scattering has been studied at E(^{6}Li) = 88 MeV, and at 36 MeV for reaction (c): see (1984AJ01). For the interaction cross section at E(^{6}Li) = 790 MeV/A (reaction (d)) see (1985TA18).
The elastic scattering has been studied at E(^{6}Li) = 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 (1984PU1A, 1985PU1B, 1986GR1A) and (1978GR22, 1982BR25, 1983DE48, 1983JO1A, 1983SA39, 1983SA1D, 1984BR1B, 1984BR28, 1984KI08, 1984WI08, 1985BR14, 1985SA1D, 1986BE45, 1986GR1G, 1986KA22, 1986SA1D, 1986SAZJ, 1986SAZK, 1986SAZL, 1987GR1N, 1987SA1C, 1987SA21; theor.). For reaction (b) see (1987AR13; theor.).
Elastic scattering has been studied for E(^{6}Li) = 26 to 99 MeV: see (1984AJ01), and at E(^{6}Li) = 34 MeV (reaction (b)) by (1987VA31) and at 210 MeV (1988NAZX; reaction (b)). ^{6}Li*(2.19) has been studied at E(^{40}Ca) = 227 MeV (1987VA31). For fusion measurements (reaction (b)) see (1984BR04). For breakup measurements (reaction (b)) see (1984GR20). See also (1986PL01) and (1983SA39, 1984GU09, 1985BL18, 1985SA1D, 1986GR1G, 1986SA1D, 1987SA21, 1986SAZJ, 1986SAZK, 1986SAZL; theor.).
Transitions to ^{6}Li*(0, 2.19, 3.56) have been observed in reaction(a): see (1979AJ01, 1984AJ01). Differential cross sections are reported for E_{bs} = 60 to 120 MeV for the n_{0} + n_{2} groups (1985SE17). Reaction (b) at 0.9 GeV involves ^{6}Li*(2.19) (1985RE1A; prelim.). See also ^{7}Li, (1986GO1M) and (1985ST1A, 1986BA2G; theor.).
Differential cross sections have been measured at E_{π+} = 75 and 175 MeV for the transitions to ^{6}Li*(0, 2.19): see (1984AJ01).
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; d_{0}, d_{1}, d_{2}; see for spectroscopic factors), 200 and 400 MeV (1985KR13; d_{0}, d_{1}; d_{2} is weakly populated at 200 MeV) and at 800 MeV (1984SM04; d_{0}, d_{1}). The ratio of the intensities of the groups to ^{6}Li*(2.19) and ^{6}Li_{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 C^{2}S= 0.87, 0.67, 0.24, (0.05), 0.14, respectively for ^{6}Li*(0, 2.19, 3.56, 4.31, 5.37). No other states were seen below E_{x} ≈ 20 MeV: see (1979AJ01). 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; theor.).
A study at E_{d} = 23.6 MeV of the relative cross sections of the analog reactions ^{7}Li(d, t)^{6}Li (to the first two T= 1 states at 3.56 and 5.37 MeV) and ^{7}Li(d, ^{3}He)^{6}He (to the ground and 1.80 MeV excited states) shows that ^{6}Li*(3.56, 5.37) have high isospin purity (α^{2} < 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 ^{6}Li*(4.31) [2^{+}] into a dinucleon [T= 1, S= 0] is (85 ± 10)%: see also reactions 13 in ^{6}He and 4 in ^{6}Be. See also (1987GUZZ; E_{d} = 18 MeV; angular distributions to ^{6}Li*(0, 2.19, 3.56); prelim.) and (1984BL21, 1986AV01, 1988GUZW; theor.).
Angular distributions have been reported at E(^{3}He) = 5.1 to 33.3 MeV [see (1974AJ01, 1984AJ01): the lower energy work has not been published]. Excited states observed in this reaction are displayed in Table 6.5 (in PDF or PS). No other states are reported below E_{x} = 10 MeV: see (1979AJ01). (1986AN04) have analyzed unpublished data which suggest the involvement of several broad highly excited states of ^{6}Li. See also (1987AL23). Several attempts have been made to look at the isospin decay of ^{6}Li*(5.37) [J^{π}; T= 2^{+}; 1] via ^{7}Li(^{3}He, α)^{6}Li* → d + α: the branching is < 1%. Γ_{p}/Γ = 0.35 ± 0.10 and Γ_{p+n}/Γ = 0.65 ± 0.10 for ^{6}Li*(5.37): see (1979AJ01). ^{4}He + d spectra suggest the excitation of ^{6}Li*(4.3) [E_{x} = 4.3 ± 0.2 MeV, Γ = 1.6 ± 0.3 MeV] and ^{6}Li*(5.7) [E_{x} = 5.65 ± 0.2 MeV, Γ = 1.65 ± 0.3 MeV]: see (1984AJ01). See also (1985DA29). At E(^{3}He) = 120 MeV the missing mass spectra for (^{3}He, 2d) and (^{3}He, pt) reflects the population of ^{6}Li*(0, 2.19) and suggests broad structures at E_{x} = 28.5 and 32.9 MeV (1985FR01). See also ^{10}B, (1988BO1J) and (1983KU17; theor.).
At E(^{6}Li) = 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; prelim.). See (1984KO25) for reaction (b).
Angular distributions of αparticles (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; α_{0}, α_{1}, α_{2}; see for spectroscopic factors). See also Table 6.5 (in PDF or PS) and (1984AJ01). ^{6}Li*(3.56) decays by γemission consistent with M1; Γ_{α}/Γ < 0.025 [forbidden by spin and parity conservation]: see (1984AJ01). At E_{p} = 9 MeV the yield of reaction (b) is dominated by FSI through ^{8}Be*(0, 2.9) and ^{6}Li*(2.19) with little or no yield from direct threebody decay: see (1979AJ01). Reactions (b) and (c) at E_{p} = 58 MeV involve ^{6}Li*(0, 2.19) (1985DE17). See also ^{10}B, (1986AN26) and (1985MAZG, 1986KA26; theor.).
See ^{5}He.
Angular distributions of ^{6}He_{g.s.} + ^{6}Li_{g.s.} and ^{6}He_{g.s.} + ^{6}Li*_{3.56} [both listed ions 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 ^{6}He and ^{6}Li differences from symmetry of as much as 40% are observed at forward angles. Angular distributions involving ^{6}He_{g.s.} + ^{6}Li*(2.19) and ^{6}Li_{g.s.} + ^{6}He*(1.8) have also been measured. This reaction appears to proceed predominantly by means of the direct pickup of a triton or ^{3}He from ^{9}Be. Differential cross sections are also reported at E_{t} = 17 MeV: see (1984AJ01) for references.
Angular distributions of ^{6}Li ions have been obtained at E(^{3}He) = 6 to 10 MeV: see (1974AJ01). A study of the continuum suggests the population of ^{6}Li states at E_{x} = 8  12, ≈ 21 and 21.5 MeV: see (1984AJ01).
Differential cross sections are reported at E_{n} = 14.4 MeV involving ^{6}Li*(2.19) and ^{5}He_{ g.s.} (1984TU02).
Angular distributions involving ^{6}Li*(0, 2.19) have been studied at E_{d} = 13.6 MeV (1983DO10) and at 19.5 MeV [see (1974AJ01)]. See also (1984SHZJ; theor.).
Angular distributions involving ^{6}Li*(0, 2.19) have been measured at E(^{3}He) = 30 MeV: see (1974AJ01).
At E_{α} = 72.5 MeV only ^{6}Li*(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 ^{6}Li*(2.19)]. The angular distributions for both transitions are flat: see (1979AJ01). See also (1984AJ01).
See (1984AJ01).
Angular distributions are reported at E(^{3}He) = 71.8 MeV involving several states in ^{8}Be (1986JA02, 1986JA14).
Angular distributions involving ^{7}Be*(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 (1983DE1C), (1984RE14) and (1987KW01, 1987KW03; theor.).
Angular distributions involving several states in ^{8}Be have been studied at E_{d} = 19.5 and 51.8 MeV [see (1974AJ01)] and at 50 MeV (1985GO1G), 54.2 MeV (1984UM04) and 78 MeV (1986JA14), as well as at E_{pol. d} = 18 and 22 MeV (1987TA07) and 51.7 MeV (1986YA12). See also (1984NE1A, 1987GO1S) and (1987KA1L, theor.).
Angular distributions have been obtained at E(^{3}He) = 28 to 40.7 MeV [see (1974AJ01)] and at E(pol. ^{3}He) = 33.4 MeV (1986CL1B; also A_{y}). See also ^{9}B.
Angular distributions (reaction (a)) at E_{α} = 42 MeV involve ^{6}Li*(0, 2.19): see (1974AJ01). At E_{α} = 65 MeV reaction (b) goes via ^{6}Li*(2.19, 4.31): see (1984AJ01). See also ^{10}B and (1987GA20).
See ^{16}O in (1986AJ04).
The fragmentation of ^{12}C into 2 ^{6}Li ions has been observed at E(^{12}C) = 2.1 GeV/A (1986LIZP).
See (1974AJ01).
Angular distributions involving ^{6}Li ions and several ^{12}C states are reported at E_{pol. d} = 22 MeV (1987TA07) and 51.7 MeV (1986YA12) and at E_{d} = 54.2 MeV (1984UM04). See also (1984NE1A), and ^{12}C in (1990AJ01) for polarization studies.
Angular distributions have been measured at E(^{3}He) = 11 to 40.7 MeV involving ^{6}Li*(0, 3.56) and various states of ^{16}O: see (1974AJ01, 1977AJ02).
