
^{7}Li (1979AJ01)(See Energy Level Diagrams for ^{7}Li) GENERAL: See also (1974AJ01) and Table 7.2 [Table of Energy Levels] (in PDF or PS). Shell model: (1974KA11, 1975DI04, 1977ST04, 1978BO31). Collective, rotational or deformed models: (1974BO25, 1976BR26). Cluster and αparticle models: (1973HO1A, 1974GR24, 1974KA11, 1975KU1H, 1975GR26, 1975MI09, 1975PA11, 1975RO1B, 1977BE50, 1977MI03, 1977SA22, 1978RA09). Astrophysical questions: (1973BA1H, 1973CA1B, 1973CO1B, 1973IB1A, 1973SM1A, 1973TI1A, 1973TR1B, 1973WE1D, 1974AU1A, 1974CA1C, 1974JA11, 1974KO1C, 1974RE1A, 1974WI1F, 1975AR1E, 1975BR1B, 1975CU1A, 1975KI14, 1975ME1E, 1975NO1D, 1975PR1B, 1975SC1H, 1975TR1A, 1976AU1B, 1976AU1C, 1976BE1C, 1976BO1E, 1976CA1C, 1976CL1A, 1976CO1B, 1976EP1A, 1976GI1C, 1976HA1F, 1976NO1C, 1976RO1J, 1976RO12, 1976SC1E, 1976SI1C, 1976SI1D, 1976VI1A, 1977AU1C, 1977AU1B, 1977BE1P, 1977BO1F, 1977CA1B, 1977KO1J, 1977MA1H, 1977MO1D, 1977MO1E, 1977SC1D, 1977ST1H, 1978AU1C, 1978BY1A, 1978MA1H). Electromagnetic transitions: (1974CH46, 1974KU06, 1974MU1B, 1976KU07, 1977DO06, 1977ST04, 1978KI08). Special levels: (1974IR04, 1974KA11, 1974KU06, 1975DI04, 1975LI20, 1976IR1B, 1978BO31). Applied work: (1976OV1A, 1976PO1C, 1977BR1H, 1977CO1F). Special reactions: (1973SI38, 1974BA70, 1974BO08, 1974JA11, 1974LA18, 1974QU01, 1975AR14, 1975BA1G, 1975FE1A, 1975KU01, 1975RA14, 1975RA21, 1975ZE01, 1976BE1K, 1976BE67, 1976BO08, 1976BU16, 1976CH28, 1976JA1E, 1976LE1F, 1976MI13, 1976NA11, 1976OS04, 1976RA1C, 1976RO12, 1977FE1B, 1977GE08, 1977GO07, 1977GR1D, 1977KU1D, 1977MO1C, 1977RE08, 1977SH1D, 1977ST34, 1977ST1G, 1977YA1B, 1978BA1J, 1978BI08, 1978DI04, 1978GE1C, 1978GR1F, 1978OT1A, 1978WE1D). Muon and neutrino capture and reactions: (1974DO1C, 1974EN10, 1974HA1E, 1975FE1B, 1975GE1E, 1977BA1R, 1977CA1E, 1977MU1A, 1978DE15, 1978LE04). Pion and kaon capture and reactions: (1972BA1C, 1973AL1A, 1973BA1G, 1973GO41, 1973NA20, 1973WI1A, 1974BO1D, 1974CL04, 1974GO04, 1974HU14, 1974LI1D, 1974TA18, 1975BA1L, 1975BA1G, 1975BA1P, 1975BO1B, 1975BU1A, 1975CA19, 1975GI1B, 1975NI1B, 1975PN1A, 1975TA1C, 1975YA02, 1976AL1F, 1976AS1B, 1976BO32, 1976CA23, 1976DO1D, 1976DU1B, 1976DY1B, 1976EN02, 1976GI01, 1976JA1D, 1976NO1D, 1976PI1B, 1976SH01, 1976TR1A, 1977AB09, 1977AL1C, 1977AL21, 1977AM1A, 1977AP1A, 1977BA27, 1977BA51, 1977BA47, 1977BA1M, 1977DO06, 1977HO1B, 1977KI1F, 1977MA35, 1977MC1E, 1977NA08, 1977SH1C, 1977SI03, 1977SP02, 1977SP1B, 1977WA02, 1978AT01, 1978CO16, 1978DA06, 1978EI1A, 1978FI1E, 1978HA1J, 1978HE02, 1978KI08, 1978MA1J, 1978ME05, 1978MO01, 1978OT1A, 1978WA02). Antiproton induced reactions: (1973GO41, 1977BA1W, 1977RO23, 1977WE1E). Other topics: (1972BA1C, 1974IR04, 1974KU06, 1974SI04, 1975ER09, 1975KU01, 1975KU08, 1975LI20, 1975PN1A, 1976BR26, 1976ES1A, 1976IR1B, 1976KU07, 1976MA04, 1978DA06). Ground state properties of ^{7}Li: (1974DE1E, 1974EN10, 1974KU06, 1974SHYR, 1975BE31, 1975JO1A, 1976BR26, 1976FU06, 1976HA1E, 1977AN21, 1977MA35, 1978AN07, 1978RA09, 1978ZA1D).
Q = 36.6 (3) mb (V. Shirley, private communication); B(E2: 3/2^{} → 1/2^{}) = 8.3 ± 0.6 e^{2} · fm^{4} (1972HA06, 1973HA47); = 7.4 ± 0.1 e^{2} · fm^{4} (1972BA77) [see also (1973HA47)].
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.
The cross section for this reaction has been measured for E_{α} = 11 to 18 MeV: the data show the effect of ^{7}Li*(7.46) and indicate a broad resonance near E_{α} = 16.8 MeV [^{7}Li*(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 ^{6}Li 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 ^{7}Li*(7.46) (1977BR21). See also (1976HA1H, 1977BE1M; theor.) and (1975AL1A) for the breakup of ^{6}Li.
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 ^{7}Li*(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.).
Angular distributions of the p_{0} and p_{1} groups are reported at E_{α} = 39.9 → 49.5 MeV (1977KI12) and 60.2, 92.4 and 140.0 MeV (1975KI14; p_{0+1}). See also (1974KO1C, 1975KI14; astrophysics) and ^{8}Be.
See (1971PO1A).
Two γrays with E_{γ} = 7247 ± 2 and 6769 ± 2 keV are observed corresponding to transitions to ^{7}Li*(0, 0.48) with branching ratios of (61 ± 3) and (39 ± 2)%. ^{7}Li*(4.63) is not involved in the decay [≲ 2%] (1967TH05). See (1974AJ01) for the earlier work on Q_{0}, 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).
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_{nbar} = 2 to 5 MeV: a multilevel Rmatrix 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 ^{6}Li and (1974HY01: σ_{el} at 14.1 MeV). The excitation function for 3.56 MeV γrays 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 [^{7}Li*(11.19)] are θ^{2}_{n} = 2 × 10^{4}, θ^{2}_{n''} = 0.16 [to ^{6}Li*(3.56)] and θ^{2}_{p} = 0.09 (1969PR04). However, an Rmatrix study of ^{4}He(t, t), ^{6}Li(n, n), and ^{6}Li(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 ^{7}Li*(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 (1977NE1A; abstract): see also reaction 3 in ^{7}Be. For other measurements see (1974AJ01). See also (1976KN1D, 1978LI1C), (1976LA1C) and (1974TE1B, 1976HA1G, 1977GU04, 1978MA37, 1978ST05; theor.).
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 p_{0} is approximately constant for E_{n} = 4.4 to 7.25 MeV (1977RO01). See also ^{6}He, (1977RI07: E_{n} = 800 MeV) and (1974BO1E, 1976GO12, 1976SL2A).
The excitation function, at forward angles, of deuterons increases monotonically for E_{n} = 5.4 to 6.8 MeV (1977RO02). See also (1976SL2A) and ^{5}He.
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 pwaves, J^{π} = 5/2^{} and has a large neutron width and a small αwidth: 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 Smatrix analysis of the ^{6}Li(n, t) reaction to 3.9 MeV suggests that the first 3/2^{} excited state of ^{7}Li 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). Crosssection 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), (1976LA1D: 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 pwave resonance at 0.25 MeV and the swave contributions which account for the large 1/v cross section for this reaction. See also (1975SC1G). Polarization measurements are reported by (1977KA06) for E_{nbar}= 0.2 to 2.4 MeV: the data suggest interference between swaves and the pwave 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.).
At E_{p} = 600 MeV, the reaction preferentially excites ^{7}Li*(4.63). ^{7}Li*(0, 0.48, 6.68, 7.46) are also populated. Angular distributions have been obtained for the pions to ^{7}Li*(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).
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.; p_{0}, p_{1}) and 0.49 to 3.44 MeV (1974MCZS, 1975MC02; p_{0}, p_{1}). In addition to ^{7}Li*(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 θ^{2}_{n} [see Table 7.3 (in PDF or PS) in (1966LA04)] are consistent with assignments ^{22}P to ^{7}Li*(0, 0.48) and ^{24}P to ^{7}Li*(7.46) (1960HA14, 1960MA32); S = 0.90 and 1.15 for ^{7}Li*(0, 0.48) (1967SC29: DWBA analysis). ^{7}Li*(0.48) has J = 1/2 since the angular correlation between p_{1} and the 0.48 MeV γrays is isotropic: see (1955AJ61). A kinematically complete study of reaction (b) at E_{d} = 10 MeV shows pronounced FSI via ^{7}Li*(7.46) and possibly ^{7}Li*(9.6) [Γ = 0.5 ± 0.1 MeV] (1971VO07). Reaction (c) strongly involves ^{7}Li*(4.63, 7.46) (1977MI13; E_{d} = 7.5 → 10.5 MeV). See also (1974MI10). See also ^{8}Be, (1977GL05, 1977TE1A) and (1975KU27, 1976KU07; theor.).
See (1974AJ01).
Not reported.
See ^{12}C in (1975AJ02) for reaction (a) and reaction 34 in ^{8}Be for reaction (b).
See Table 7.4 (in PDF or PS) in (1966LA04) [summary of early measurements] for τ_{m} of ^{7}Li*(0.48) = 0.107 ± 0.005 psec.
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 n_{0+1}, n_{0} and n_{1}, for E_{γ} = 7 to 25 MeV. The integrated cross section to 23 MeV is 39 ± 4 MeV · mb for the n_{0} transition and 17 ± 4 MeV · mb for the n_{1} transition: together these account for 0.4 of the exchange augmented dipole sum of ^{7}Li (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 p_{0+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, 1976MU1A) and ^{6}He. 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 ^{5}He_{g.s.} and possibly to the first excited state are reported. States of ^{7}Li 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.).
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 pshell: 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 ^{6}Li and from ^{7}Li as a function of (momentum transfer)^{2} yields < r^{2} >^{1/2}_{6}/< r^{2} >^{1/2}_{7} = 1.001 ± 0.008. The rms radius of the ground state magnetization density distribution, < r^{2} >^{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 μ^{2}_{N}. The cross section for the longitudinal excitation of ^{7}Li*(0.48) has been found from the scattering through angles of 90° to 150°, B(C2↑; 0.48) = 7 ± 4 fm^{4}. 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 fm^{2} (1966RA29). Inelastic scattering studies show peaks corresponding to ^{7}Li*(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.).
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; n_{0}, n_{1}), 4.0 to 7.5 MeV (1976KN1D, 1976LA1C; n_{0+1}), 7 to 13 MeV (1976BI1B, 1976GL1A; n_{0+1}, n_{2}), 14.1 MeV (1974HY01; n_{0+1}, n_{2}; 1977HO31; n_{0+1}) and 14.6 MeV (1976MI1C; n_{0+1}). Reaction (b) at E_{n} = 14.4 MeV proceeds primarily via ^{7}Li*(4.63) although some involvement of ^{7}Li*(6.68) may also occur (1974AN02). See also (1976RI1A). For reaction (c) see (1978RI02) and reaction 12 in ^{6}Li. See also ^{8}Li, (1974TU1A, 1977KN1B) and (1977HO1A; theor.).
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 ^{7}Li*(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 ^{7}Li*(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 fm^{4} for ^{7}Li*(0.48, 4.63, 6.68); Γ(E2↓) = 0.43, 0.025 and 0.029 μeV (1965JA1A). A comparison of σ_{t} for ^{7}Li(p, p')^{7}Li*(0.48) and ^{7}Li(p, n)^{7}Be*(0.43) has been carried out for E_{p} = 23 to 52 MeV: the spinflip, isospinflip 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 ^{6}He. 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 ^{7}Li*(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 quasifree reaction process p + α → d + ^{3}He. The derived S_{α}, in this work, is 1.09 ± 0.11 (1977CO07).
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: d_{0}) and 3 to 10 MeV (1976AB11; d_{0}). See also (1974CH58; theor.) and ^{9}Be.
Angular distributions have been measured at E(^{3}He) = 11 MeV (1970SC23; elastic). [Other papers quoted in (1974AJ01) have not been published.] At E(^{3}He) = 37.5 MeV, the threebody final states which are most strongly populated are the ^{3}He + α + t and ^{3}He + d + ^{5}He branches. Detection of ^{3}He  t coincidences lead to a most probable momentum for the spectator αparticle of 60 MeV/c; the d  ^{3}He breakup results suggest the unlikelihood of deuteron clusters in ^{7}Li (1976WA12).
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). ^{7}Li*(4.63) is strongly involved in the sequential decay. The population of ^{7}Li*(7.46) is reported by (1970LA14). See also (1975GR41, 1975VO1B) and (1974BE1J, 1974KA32, 1974KU1A, 1975MI09, 1977BE51, 1977NI1A, 1977SA22; theor.).
The elastic angular distribution has been studied for E(^{7}Li) = 4.0 to 6.5 MeV (1966PI02). See also (1978NO08).
The elastic angular distribution has been measured at E(^{7}Li) = 34 MeV (1977KE09).
See ^{10}B.
The elastic scattering has been studied at E(^{7}Libar) = 9 MeV (1978DR07) and E(^{7}Li) = 4.5 to 13 MeV (1976PO02), 20 MeV (1969BE90) [on ^{13}C] and at 34 [^{13}C] and 36 [^{12}C] MeV (1973SC26). The inelastic scattering angular distributions involving ^{7}Li*_{0.48} + ^{12}C_{g.s.} and ^{7}Li*_{0.48} + ^{12}C*_{4.43} have been measured at E(^{7}Li) = 36 MeV (1973SC26). See also ^{12}C in (1975AJ02) and ^{13}C in (1976AJ04).
See Table 16.25 (in PDF or PS) in (1977AJ02) and (1976PO02: E(^{7}Li) = 9.0 and 13.0 MeV).
The elastic angular distribution has been measured at E(^{7}Li) = 36 MeV (1976CO23).
The decay proceeds to the ground and 0.48 MeV states. The branching ratio to ^{7}Li*(0.48) is (10.32 ± 0.16)% (1962TA11), (10.42 ± 0.18)% (1973PO10), (10.35 ± 0.8)% (1974GO26). The weighted mean of the halflife 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 ^{7}Li*(0, 0.48) respectively (M.J. Martin, Nuclear Data Project, private communication). The energy of the γray is 477.593 ± 0.012 keV (1971HE20) [E_{x} = 477.611 ± 0.012 keV]. A measurement of the bremsstrahlung spectrum to ^{7}Li*(0.48) measured in coincidence with the 478 keV γray 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.).
See ^{9}Be.
The capture of stopped pions has been studied in a kinematically complete experiment by (1977BA51): ^{7}Li*(0, 0.48) are weakly populated. Two large peaks are attributed to the excitation of ^{7}Li*(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).
Angular distributions of the t_{0} and t_{1} groups are reported at E_{n} = 13.99 MeV (1974PE06). See also (1976DI13, 1977RO01) and ^{10}Be.
At E_{p} = 43.7 MeV angular distributions have been obtained for the ^{3}He particles corresponding to ^{7}Li*(0, 0.48, 4.63, 7.46). The 7.46 MeV state is strongly excited while the mirror state in ^{7}Be is not appreciably populated in the mirror reaction (see reaction 17 in ^{7}Be). The angular distribution indicates that the transition to ^{7}Li*(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 ^{7}Be. For reaction (b) see ^{9}Be.
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; α_{0+1}), 0.22 to 2.50 MeV (1974CH1L; α_{0}, α_{1}), 0.6 to 2.2 MeV (1974FR02; α_{0}, α_{1}), 0.9 to 2.5 MeV (1976BO45; α_{0}, α_{1}), 2.25 to 3.1 MeV (1977SL02; α_{0}, α_{1}) and 12.35 and 14.06 MeV (1978TA04; α_{0}, α_{1}, α_{2}, α_{4}). A study at E_{d} = 11 MeV finds Γ_{c.m.} = 93 ± 25 and 80 ± 20 keV, respectively, for ^{7}Li*(4.63, 7.46). No evidence was observed for ^{7}Li*(5.5, 8.6, 9.7, 12.5) or for the T = 3/2 state ^{7}Li*(11.25) (1966HA09). In a kinematically complete study of reaction (b) at E_{d} = 26.3 MeV, ^{7}Li*(4.6, 6.5 + 7.5, 9.4) are strongly excited. No sharp αdecaying states of ^{7}Li are observed with 10 < E_{x} < 25 MeV. Parameters for ^{7}Li*(9.7) are E_{x} = 9.36 ± 0.05 MeV, Γ = 0.8 ± 0.2 MeV (1973SO08). See also ^{8}Be, ^{11}B in (1980AJ01) and (1974SO1C).
See (1976VO1A).
See (1974AJ01).
Angular distributions have been studied (reaction (a)) for E(^{6}Li) = 5.5 and 6.5 MeV to ^{7}Li*(0, 0.48) (1974VO06). See ^{11}B in (1975AJ02) for reaction (b).
See (1976EP1A; astrophysics).
Angular distributions have been studied at E_{n} = 0.2 to 1.25 MeV (1976SE06; α_{0}, α_{1}), 13.9 MeV (1978MO09; α_{0+1}, α_{2}) and 14.4 MeV (1969AN25; α_{0+1}, α_{2}). τ_{m}(0.48) = 92 ± 11 fsec (1967CA02). See also (1974ST1C, 1974TU1A, 1975LA08, 1978ST1H), ^{11}B in (1975AJ02) and (1974HA1D, 1975MU1A, 1978BI1E, 1978DU1E; applications).
See ^{11}B in (1975AJ02).
See (1964BA1C).
For reaction (a) see (1974AJ01). Angular distributions have been measured at E_{α} = 28.4 and 29.0 MeV (1968KA24: to ^{7}Li*(0, 0.48) and ^{8}Be*(0, 2.9)) and at 65 MeV (1976WO11: ^{7}Li*(0, 4.63)). The angular distributions are quite featureless (1976WO11). At E_{α} = 65 and 72.5 MeV ^{7}Li*(0, 4.64 ± 0.03) are very strongly populated while ^{7}Li*(0.48, 6.68, 7.46) are weakly excited (1973WO06, 1974WO1C, 1976WO11). See also (1974WO1D) and (1973SC1B).
At E_{d} = 19.5 MeV angular distributions have been measured for the transitions to ^{6}Li(0) and ^{7}Li*(0, 0.48) (1971GU07). See also (1974AJ01).
See reaction 4 in ^{20}Ne in (1978AJ03).
At E_{d} = 39.8 MeV, angular distributions have been measured for the transitions to ^{7}Li(0) + ^{7}Be(0), ^{7}Li*(0.48) + ^{7}Be(0), ^{7}Li(0) + ^{7}Be*(0.43), and ^{7}Li*(0.48) + ^{7}Be*(0.43). Asymmetries exceeding 20% are observed in the ratio of the cross sections to ^{7}Li(0) and ^{7}Be(0) (1971YO06). See also (1974VA1A).
See (1971DE37). See also (1975PA11; theor.).
At E(^{6}Li) = 36 MeV, angular distributions have been obtained for the transitions involving ^{7}Li_{g.s.} + ^{11}C_{g.s.} and ^{7}Li*_{0.48} + ^{11}C_{g.s.} (1973SC26).
At E_{p} = 45.0 MeV an angular distribution has been measured for the transition to ^{7}Be(0) + ^{7}Li(0) (1971BR07).
At E_{d} = 14.6 MeV, angular distributions are reported for the transitions to ^{8}Be(0) and ^{7}Li*(0, 0.48) (1967DE03).
At E(^{6}Li) = 34 MeV angular distributions have been measured for the transitions involving ^{7}Li_{g.s.} + ^{12}C_{g.s.}, ^{7}Li*_{0.48} + ^{12}C_{g.s.}, ^{7}Li_{g.s.} + ^{12}C*_{4.4}, and ^{7}Li*_{0.48} + ^{12}C*_{4.4} (1973SC26).
At E_{n} = 14.1 MeV, ^{7}Li*(0, 0.48) are produced with about equal probability (1971SC16). At E_{n} = 18.2 MeV, ^{7}Li*(4.63) may be involved (1976TU04, 1977TU1D).
See reaction 38 in ^{13}N in (1976AJ04).
See reaction 45 in ^{13}N in (1976AJ04).
See reaction 30 in ^{15}O in (1976AJ04).
At E_{d} = 14.6 to 15.0 MeV, angular distributions have been measured for the transitions to ^{12}C(0) + ^{7}Li*(0, 0.48) [reaction (a)], ^{13}C(0) + ^{7}Li*(0, 0.48) [reaction (b)] and ^{14}N(0) + ^{7}Li*(0, 0.48) [reaction (c)] (1967DE03).
See (1978SA1F).
