
^{5}Li (2002TI10)(See Energy Level Diagrams for ^{5}Li) GENERAL: References to articles on general properties of ^{5}Li published since the previous review (1988AJ01) are grouped into categories and listed, along with brief descriptions of each item, in the General Tables for ^{5}Li located on our website at (nucldata.tunl.duke.edu/NuclData/General_Tables/5li.shtml). See also 3 [Electromagnetic Transitions in A = 57] (in PDF or PS) and 5.3 [Table of Energy Levels] (in PDF or PS). See also the A = 5 introductory discussion titled A = 5 resonance parameters.
Gamma rays were measured over a large dynamic range for E_{α} = 200 MeV (2000HO18). Both inclusive and exclusive (coincidence with either α particle, proton or both) measurements were performed. A pronounced contribution from capture into the unbound ground and first excited states of ^{5}Li was observed. For the measured parameters of the ^{5}Li resonances, see 5.5 (in PDF or PS).
Angular distributions and analyzing powers for polarized ^{3}He on ^{2}H at E_{3He} = 22.5, 24, 27, 30, 33 MeV were measured and analyzed by (2000OK01). Based on the phase shifts, they report the following resonances identified with ^{5}Li with excitation energies between 15 and 30 MeV: "(i) the wellestablished (1988AJ01) ^{4}S_{3/2} state at 16.7 MeV; (ii) a broad ^{2}S_{1/2} state around 19 MeV; (iii) quartet D states around 20 MeV, [5/2^{+} and 3/2^{+} assigned before (1988AJ01)]; (iv) two doublet P states (3/2^{}, 1/2^{}) around 25 MeV; and (v) at least one negative parity state around 29 MeV." The results are compared with shell model calculations. See also reaction 5 below.
The previous review (1988AJ01) describes the earlier work as follows: "The ratio Γ_{γ}/Γ_{p}α has been determined for E(^{3}He) = 63 to 150 keV [E_{cm} = 25 to 60 keV] by (1985CE13) by measuring simultaneously the γrays and the charged particles. Because of the large widths of the final states, γ_{0} and γ_{1} could not be resolved but the results are consistent with E_{x} = 3.0 ± 1.0 MeV for the excited state. Γ_{γ0}/Γ_{p}α is roughly constant for E_{cm} = 25 to 60 keV at (4.5 ± 1.2) × 10^{5} and Γ_{γ1}/Γ_{p}α = (8 ± 3) × 10^{5} at E(^{3}He) = 150 keV (1985CE13)". For applications see (1985CE13, 1985CE16, 1988CE04, 1992LI32). "Excitation curves and angular distributions have been measured for E_{d} = 0.2 to 5 MeV and E(^{3}He) = 2 to 26 MeV. A broad maximum in the cross section is observed at E_{d} = 0.45 ± 0.04 MeV [^{5}Li*(16.7)]. σ_{γ0} = 21 ± 4 μb, Γ_{γ0} = 5 ± 1 eV. The radiation at resonance is isotropic, consistent with swave capture. Study of γ_{0} and γ_{1} yields Γ = 2.6 ± 0.4 MeV for the groundstate width (but see below), and E_{x} = 7.5 ± 1.0 MeV, Γ = 6.6 ± 1.2 MeV for the 1/2^{} state: see (1979AJ01, 1988AJ01). An excess in the cross section at higher bombarding energies is interpreted as being due to a state at E_{x} ≈ 18 MeV: even parity is deduced from the relative intensity of γ_{0} and γ_{1}. A broad peak is also observed at E_{x} ≈ 20.7 MeV in the γ_{0} cross section. The cross section for γ_{1} is ≈ 0. The observations are consistent with J^{π} = 5/2^{+}: angular distributions appear to require at least one other state with significant strength near 19 MeV: see (1979AJ01)". In more recent measurements at E_{d} = 8.6 MeV a ground state width Γ_{p} = 2.44 ± 0.21 MeV was extracted from the γ_{0} spectrum (1991BA02). An analysis of these data with single level Rmatrix fits (1996EF03) gave values for the energies and widths of the ground states of ^{5}Li and ^{5}He. Cross section and analyzing power measurements in the 3/2^{+} fusion resonance region (E_{d} = 0.45 MeV) and E_{d} = 8.6 MeV were reported by (1991WEZZ, 1992BA04, 1994BA02, 1998WE07), and comparisons with the results of coupledchannels resonating group model calculations were discussed. See also the shell model description of the 3/2^{+} resonance discussed in (1993KU02). Potential model descriptions of this reaction are discussed in (1990NE14, 1992LI32, 1992NE03, 1995DU13). Analyzing power formulae derived in a modelindependent way are presented in (1996TA09). Measurements of highenergy (> 20 MeV) gamma ray production in the reaction are described in (1992PI04).
Excitation functions and angular distributions have been measured for E_{cm} = 6.95 to 171.3 keV, and values of S(E) have been deduced: S(0) = 6.3 ± 0.6 MeV · b (1987KR18). See also (1984AJ01, 1988AJ01). Sfactors have been obtained down to E_{cm} = 5.88 keV. The effect on S of electron screening at low energies has been studied by (1988EN03, 1988SCZG, 1988SC1F). See also the calculations of (1989BE08, 1990BR12). A pronounced resonance occurs at E_{d} = 430 keV, Γ ≈ 450 keV. The peak cross section is 695 ± 14 mb: see 5.2 (in PDF or PS) in (1979AJ01). The recent work of (1997BA72) discusses a description of the 3/2^{+} levels of ^{5}Li and ^{5}He in terms of conventional Rmatrix parameters. Excitation functions for groundstate protons have also been reported for E(^{3}He) = 0.39 to 2.15 MeV and 18.7 to 44.1 MeV and for E_{d} = 2.8 to 17.8 MeV [see (1979AJ01)]. Angular distributions have been measured for E_{d} = 0.25 to 27 MeV and E(^{3}He) = 18.7 to 44.1 MeV [see 5.6 (in PDF or PS) in (1974AJ01) and the discussion in (1979AJ01)]. Resonancelike behavior has been suggested at E_{x} = 16.6, 17.5, 20.0, 20.9 and 22.4 MeV: see (1979AJ01). In early work, tensor analyzing power measurements were reported for E_{d} = 0.48 to 6.64 MeV (1980DR01). [See, however, (1980GR14) for a discussion of the (1980DR01) results and for a summary of T_{20}(0°) for E_{d} = 0 to 40 MeV.] Measurements of angular distributions and analyzing powers at E(^{3}He) = 27 and 33 MeV have suggested the presence of a broad resonance(s) at E_{x} ≈ 28 MeV. Vector and tensor analyzing powers have been studied at E_{d} = 1.0 to 13.0 MeV (1986BI1C, 1986BIZP) and 18, 20 and 22 MeV (1986SA1L). See also (1986RO1J) and 5.6 (in PDF or PS) in (1974AJ01) and 5.4 (in PDF or PS) in (1979AJ01). In recent work of (1999GE19), angular distributions and complete sets of analyzing powers were measured at five energies between E_{d} = 60 and 641 keV. The data were included in an Rmatrix analysis of the ^{5}Li system (see 5.6 (in PDF or PS)). Multichannel resonating group model calculations for this reaction are presented in (1988GU07, 1990BL02, 1990BL08). A modelindependent description of the d + ^{3}He system near the low energy 3/2^{+} resonance using the effective range expansion is described in (1996PO26). Differential cross sections for reaction (b) were measured at E_{d} = 23.08 MeV (1988BR27, 1990BR14). Triple differential cross sections and vector analyzing powers were measured at E_{d} = 17 MeV (1989AYZZ, 1990AYZW) and at E(^{3}He) = 32.25 MeV (1988DA18, 1991DA06). The d^{3}He fusion process in reactors is discussed in (1988DA26, 1988MI29, 1988MO36). Applications of the reaction in studying deuterium diffusion behavior in materials is discussed in (1989PA26, 1990QIZZ). See also (1990LE30, 1990WI1L). It is suggested that at low energies [E_{d} = 2.2 to 6 MeV] reaction (c) goes primarily via a J^{π} = 3/2^{}, T = 1/2 state of ^{5}Li located 0.8 ± 0.2 MeV above threshold [i.e., E_{x} = 18.9 ± 0.2 MeV]: see (1979AJ01). Other studies of the breakup have been reported at E_{d} = 23.08 MeV (1986BR1J; reaction (c)) and 60 MeV (1985OK03; reaction (d)). For the earlier work see (1984AJ01). See also other references cited in (1988AJ01). For a descriptive list of theoretical work on this reaction see the General Table for ^{5}Li located on our website at (nucldata.tunl.duke.edu/NuclData/General_Tables/5li.shtml).
In the range E_{d} = 380 to 570 keV, the scattering cross section is consistent with swave formation of the J^{π} = 3/2^{+} state at 16.66 MeV. The excitation curves for E_{d} = 1.96 to 10.99 MeV show a broad resonance (Γ > 1 MeV) corresponding to E_{x} = 20.0 ± 0.5 MeV. From the behavior of the angular distributions an assignment of ^{2}D_{3/2} or (^{2}D, ^{4}D_{5/2} is favored, if only one state is involved: see (1979AJ01). A phaseshift analysis of the angular distribution and VAP data below 5 MeV suggests several MeV broad states [^{2}P_{3/2}, ^{4}D_{7/2}, ^{4}D_{5/2}, ^{4}D_{3/2} and, possibly, ^{4}D_{1/2}]: see (1984AJ01). See also (1987KR18). Angular distributions and analyzing powers have been measured at many energies to E = 44 MeV: see (1979AJ01, 1984AJ01) for the earlier work, (1982COZO, 1983COZR; E_{d} = 10 MeV) and (1987YAZJ; E_{d} = 29.5 MeV on polarized ^{3}He). For d^{3}He correlations see (1987PO03). See also "Complex reactions" in the ^{5}Li General section of (1988AJ01). The Rmatrix formalism was used by (1990TR08) to calculate the S(1/2^{+})wave cross section for d + ^{3}He, using p + ^{4}He cross section data and d + ^{3}He analyzing power data from the ^{5}Li(3/2^{+}) region. See also the work of (1997BA72). A generalized potential model description of ^{3}He + d scattering is discussed in (1991NE01). For earlier theoretical work see references cited in (1988AJ01).
At E(^{3}He) = 14 to 26 MeV ^{5}Li*(0, 20.5 ± 0.8) are populated: see (1979AJ01). See also ^{6}Li.
The spectrum of protons at E(^{3}He) = 3 to 18 MeV shows a pronounced peak corresponding to ^{5}Li_{g.s.} superposed on a continuum: see (1979AJ01). The angular distribution of p_{0} has been measured at E(^{3}He) = 26 MeV (1983KI10; polarized target). See also ^{6}Be and (1986OS1D).
The contribution of unbound ^{6}Li nuclear states to deuteron spectra from this reaction was calculated by (1993GO16).
Differential cross sections and polarization measurements have been carried out at many energies: see (1966LA04, 1974AJ01, 1979AJ01, 1984AJ01) for the earlier work. More recent measurements were reported (1988AJ01) at E_{p} = 65 MeV (1986FU05; A_{y}), 100 MeV (1983NAZV, 1985GUZX; σ(θ), A_{y}) and 495 MeV (1988STZZ) and at E_{p} = 695, 793, 890, 991 MeV (1985VE13; σ(θ)) and 1 GeV (1985AL09; σ(θ)). Cross sections and A_{y} at E_{p} = 98.7 and 149.3 MeV for the continuum were reported by (1985WE06). In experimental work reported since the previous review (1988AJ01), differential cross sections were measured for E_{p} = 695, 793, 890, 991 MeV by (1989GR20) with phase shift analysis and at 607 MeV/c by (1991BA1V). Differential cross sections and analyzing powers at 71.9 MeV were measured (1989BU01) and combined with existing data for E_{p} = 30  65 MeV for a phase shift analysis. Measurements of analyzing power at E_{p} = 180 MeV were reported by (1990WEZY). Cross sections for the p + ^{4}He interaction at GeV energies have been measured at 2.7 GeV/c (1993AB07), at 8.6 and 13.6 GeV/c (1989BR30, 1993GL09), and at √s (square root of s) = 31.5 GeV (1989AK05). For earlier work at very high energies, see references cited in (1988AJ01). The previous review (1988AJ01) summarizes the analyses reported prior to 1988 as follows: "Phase shifts below E_{p} = 18 MeV have been determined by (1977DO01) based on all the available crosssection and polarization measurements, using an Rmatrix analysis program. The P_{3/2} phase shift shows a pronounced resonance corresponding to ^{5}Li_{g.s.} while the P_{1/2} shift changes slowly over a range of several MeV, suggesting that the first excited state is very broad and located 5  10 MeV above the ground state. The reduced widths of the Pwave resonance states are nearly the same. The D_{5/2}, D_{3/2}, F_{7/2} and F_{5/2} phase shifts become greater than 1° at E_{p} ≈ 11, 13, 14 and 16 MeV, respectively (1977DO01). (1986TH1C; prelim.) have measured A_{y} for 1.1 ≤ E_{p} ≤ 2.15 MeV: A_{y} = 1 for E_{p} = 1.89 MeV, θ_{cm} = 87.0°." "A phaseshift analysis for E_{p} = 21.8 to 55 MeV is presented by (1978HO17) [see also analyzingpower contour diagram for E_{p} = 20 to 65 MeV]. A striking anomaly is seen in the analyzing power at E_{p} = 23 MeV and the ^{2}D_{3/2} phase shift clearly shows the 3/2^{+} state at E_{x} = 16.7 MeV [see also (1979AJ01)]. The other phase shifts ^{2}S_{1/2}, ^{2}P_{3/2}, ^{2}P_{1/2}, ^{2}D_{5/2}, ^{2}F_{7/2}, ^{2}F_{5/2}, ^{2}G_{9/2} and ^{2}G_{7/2} are smooth functions of energy. Both the ^{2}P_{3/2} and ^{2}P_{1/2} inelastic parameters show a somewhat anomalous behavior at E_{p} ≈ 30 MeV; the absorption first increases then decreases to stay rather constant at E_{p} > 40 MeV. These results are consistent with broad and overlapping states with J^{π} = 1/2^{} and 3/2^{} at E_{x} ≈ 22 MeV. There is very little splitting of the real parts of the Fwave phase shifts up to 40 MeV. There is some indication (from the ^{2}G_{7/2} phase shifts) of a 7/2^{+} level around E_{p} = 29 MeV [E_{x} ≈ 21 MeV]. The Gwaves are necessary to fit the detailed shape of the angular distributions for E_{p} = 20 to 55 MeV (1978HO17). For a contour diagram of the analyzing power for E_{p} = 130 to 1800 MeV see (1980MO09). For a measurement of the spin rotation parameter, R, at E_{p} = 500 MeV see (1983MO01). See also (1986SA1J; prelim.; E_{p} = 65 MeV)." Theory and analyses reported since the previous review (1988AJ01) include: the Smatrix studies of resonances in the A = 5 system of (1998CS02); the Smatrix and Rmatrix determination of the 3/2^{} and 5/2^{} states of ^{5}Li of (1997CS01); and the study of the 3/2^{+} levels of ^{5}Li on ^{5}He based on conventional Rmatrix parameters (1997BA72). See also the study of the cluster potential model (1997DU15), and the calculation of interaction potentials by inversion of scattering phase shifts (1996AL01). See also (1996CO20). Other theoretical work reported since the previous review (1988AJ01) includes calculations for pα potentials derived from phase shifts for E_{p} ≤ 23 MeV (1991CO05) and at E_{p} = 64.9 MeV (1989CO11). Multichannel resonating group calculations are presented in (1989KA39, 1990BL02). The resonating group method was applied in the region E_{p} = 50  120 MeV by (1993KA47). See also the dynamic microscopic model calculation reported by (1993CS02). Glauber theory calculations of cross sections at intermediate energies were reported by (1993MA47). Other theoretical work related to ^{4}He + p scattering is included in the descriptive list in the General Table for ^{5}Li located on our website at (nucldata.tunl.duke.edu/NuclData/General_Tables/5li.shtml). In earlier work PNC effects were studied via the elastic scattering of 46 MeV longitudinally polarized protons on ^{4}He: the longitudinal power A_{z} = (3.3 ± 0.9) × 10^{7}. This was obtained by measuring σ^{+} and σ^{} for the positive and negative helicity of the incident protons (1985LA01, 1986LA29): the conclusion reached by the authors from this, and all other experiments, is that there does not exist any evidence for a nonzero value of f_{π}, the weak isovector coupling constant. See also (1984AJ01) and (1986ADZT, 1986HA1Q, 1988NA18). For α + p correlations see (1987PO03). In applicationrelated work, a method for precise absolute calibration of polarization effects is applied to pα scattering at E_{p} = 25.68 MeV by (1989CL04). Measurements of recoil cross sections for α particles on protons in connection with depth profiling were reported at E(^{3}He) = 0.9  3.4 MeV (1989SZ04) and at E(^{3}He) = 1.3  2.1 MeV (1988WA22).
As reported in (1988AJ01) angular distributions of deuterons and of ^{3}He ions (reaction (a)) have been measured for E_{p} = 27.9 to 770 MeV and at E_{α} = 3.98 GeV/c [see (1979AJ01, 1984AJ01)]. Angular distributions and analyzing powers were measured at E_{p} = 100 MeV (1983NAZV), 200 and 400 MeV (1986AL01). Excitation functions are reported at several energies in the range E_{p} = 38.5 to 44.6 MeV and 200 to 500 MeV. Continuum yields and analyzing powers have been studied at E_{p} = 98.7 and 149.3 MeV by (1985WE06). For polarization measurements to 500 MeV see above and (1979AJ01, 1984AJ01, 1988BAZH). More recently, analyzing powers and differential cross sections were measured at E_{p} = 32, 40, 50 and 52.5 MeV by (1991SA17). For reactions (b), (c) and (d) see (1974AJ01, 1979AJ01, 1984AJ01). The breakup of ^{4}He via reaction (c) has been studied by (1986FU05): large values of A_{y} in the FSI region were reported. In more recent work on reactions (b), (c) and (d), quasifree knockout of charged particles for ^{4}He was studied at E_{p} = 100 MeV by (1990WH01). For astrophysicsrelated theoretical work see (1989GU28, 1990BI06). For breakup processes at high energies, including pion production, see (1988AJ01).
In early work, antiproton interactions with ^{4}He were studied by (1984BA60, 1985BA76, 1987BA12, 1987BA47, 1987BA69). See also (1983FA16, 1984BA74, 1984FA14, 1986DO20, 1987NA23). More recently, the production rate of ^{1}H, ^{2}H, ^{3}H in pbar^{4}He annihilation was studied between 0  600 MeV/c by (1988BA62), the annihilation cross section near 45 MeV/c was measured (1989BA59), and the cross section for production of Λ hyperons and K^{0}_{s} mesons at 600 MeV/c was measured by (1989BA94). Calculations for the knockout and annihilation reactions were presented by (1989NA16), and a study of the change of the branching ratio of channels for pbar^{4}He annihilation in the nuclear medium is discussed in (1989NA16).
For reaction (a) see reaction 10 in ^{5}He, (1985WI15) and (1987KAZL; E_{d} = 15 MeV; n_{0}). Early work on reaction (b) reported in (1988AJ01) includes measurements at E_{d} = 12 to 17 MeV and at E_{α} = 18.0 to 140 MeV: see (1979AJ01, 1984AJ01), ^{6}Li and (1985DO03, 1987KUZI). More recently, measurements of cross sections and analyzing powers at E_{d} = 7 MeV were reported by (1988GA14). Comparison of data at E_{d} = 12 and 17 MeV with predictions of the threebody model are made by (1988SU12). The effects of the internal structure of the α particle in a threebody description of the d + α reaction are explored by (1990KU27). Multiconfiguration resonating group calculations are discussed in (1991FU01, 1992FU10).
At E_{α} = 26.3 MeV, ^{5}Li_{g.s.} is reported to have a width of 1.9 ± 0.25 MeV while the first excited state is suggested to lie at E_{x} = 2.82 ± 0.35 MeV, Γ = 1.64 ± 0.25 MeV [reaction (b)]: see (1982NE09, 1986YA01). See also (1985NEZW).
Measurements were made at E_{α} = 120, 160 and 200 MeV (1998ST07). Differential cross sections were extracted from measured triton energy spectra. Line shapes of the ^{5}Li ground state resonance was well reproduced by DWBA calculations.
See reaction 12 in ^{5}He and (1988WO10).
Available experimental data at energies up to E_{γ} = 50 MeV are reviewed and analyzed (1990VA16) to explore cluster effects and finalstate interactions.
In early work, differential cross sections have been measured at T_{π} = 75 and 150 MeV for p_{0}: see (1984AJ01). More recently cross section measurements at E_{π} = 50, 100, 150 and 200 MeV were reported by (1992RA01). DWIA calculations presented in (1992KH04) provide predictions of cross sections at T_{π} = 115, 165 and 255 MeV.
Angular distributions have been measured at E_{p} = 18.6 to 185 MeV. At the highest energy, the spectra are characterized by a broad asymmetric peak corresponding to ^{5}Li_{g.s.}, a narrow peak [^{5}Li*(16.7)] and a broad peak at E_{x} ≈ 20 MeV. DWBA analysis leads to C^{2}S = 0.64 and 0.57 for ^{5}Li*(0, 16.7). The first excited state of ^{5}Li is also reported to be populated: see (1984AJ01). Reaction (b) has been studied at E_{p} = 9 to 50 MeV: the pα FSI corresponding to ^{5}Li_{g.s.} is observed [see (1979AJ01)]. See also (1983CA13, 1986NI1B). At 1 GeV (reaction (c)) the separation energy between 4  5 MeV broad 1p_{3/2} and 1s_{1/2} peaks is reported to be 17.7 ± 0.5 MeV (1985BE30, 1985DO16). See also (1985PA03; E_{p} = 70 MeV).
In early work, angular distributions of the t_{0} group were measured at E_{d} = 15 and 20 MeV: see (1979AJ01). More recently the production cross section for triton was measured by radiochemical methods (1997ABZY). Calculations of differential cross sections for E_{d} < 30 MeV are described in (1997HAZK, 1997HAZY). Reaction (b) has been studied at E_{d} = 0.12 to 10.5 MeV: see (1984AJ01). See also ^{8}Be in (1988AJ01).
In early work reviewed in (1988AJ01) at E(^{3}He) = 25.5 MeV, ^{5}Li*(0, 16.7) and two broad peaks at E_{x} ≈ 19.8 and 22.7 MeV [Γ_{cm} = 2 and 1 MeV] are populated: see (1979AJ01). At E(^{3}He) = 33.3 MeV angular distributions and analyzing powers have been studied for ^{5}Li*(0, 16.7) [Γ ≈ 1.6 and ≈ 0.4 MeV]: see (1984AJ01). More recently, in experiments at E(^{3}He) = 8, 11, 13 and 14 MeV (1989ARZI, 1990AR17), the ^{5}Li state at E_{x} = 16.7 MeV was observed and the width measured to be Γ = 150 ± 40 keV. In reaction (b) an analysis (1989AR20) of data at E(^{3}He) = 2.5 MeV gave Γ = 1.55 ± 0.2 MeV for ^{5}Li_{g.s.}. Measurements at E(^{3}He) = 1.6, 3.5, 7.0 and 9.0 (1992AR20) found the ^{5}Li_{g.s.} width consistent with (1988AJ01) and independent of ^{3}He incident energy. Work reported for E(^{3}He) = 1.6 MeV (1991AR25) and E(^{3}He) = 7 and 9 MeV (1993AR12) determined that the ground state width is independent of detector angle. In early work reviewed in (1988AJ01) the parameters of the first excited state are deduced to be E_{x} = 5.0 ± 0.7 MeV, Γ_{cm} = 5.7 ± 0.7 MeV (1984AR17; E(^{3}He) = 1.7 and 2.3 MeV), E_{x} = 5.8 ± 0.5 MeV, Γ_{cm} = 5.2 ± 0.5 MeV (1987FA1I; E(^{3}He) = 1.65 MeV). More recently an experiment at E(^{3}He) = 2.0 and 2.2 MeV (1992DA1K) found values in line with those measured at E(^{3}He) = 1.65 and 1.7 MeV. Measurements at E(^{3}He) = 11, 13 and 14 MeV reported by (1989AR08) determined parameters for E_{x} ≈ 18 MeV and found a level at E_{x} = 17.9 ± 0.4 MeV, Γ = 3.5 ± 0.8 MeV. Angular distributions of protons from the decay of ^{5}Li_{g.s.} are reported by (1988BU04; E(^{3}He) = 1.5 MeV). See also references cited in (1988AJ01). A recent theoretical study (1996FA05) of the properties of resonance scattering in two fragment systems calculates parameters for the E_{x} = 16.66 MeV states formed in reaction (b).
Angular distributions have been measured at E(^{6}Li) = 156 MeV to ^{5}Li_{g.s.}. Unresolved states at E_{x} = 16  20 MeV are also populated (1987MI34).
See reaction 12 in ^{5}He and (1988WO10).
At E_{p} = 43.7 MeV, a triton group is observed to ^{5}Li_{g.s.} (Γ = 1.55 ± 0.15 MeV): the angular distribution is consistent with a substantial mixing of L = 0 and 2 transfer. There is some evidence also for a very broad excited state between E_{x} = 2 and 5 MeV. ^{5}Li*(16.7, 20.0) were not observed. The formation of ^{5}Li*(16.7)(^{4}S_{3/2}) would be Sforbidden: the absence of ^{5}Li*(20.0) would indicate that this state(s) is also of quartet character [see reaction 23 in ^{5}He]. Weak, broad states at E_{x} = 22.0 ± 0.5 MeV and 25.0 ± 0.5 MeV and possibly 34 MeV are reported in a coincidence experiment in which three and fourparticle breakup was analyzed: see (1979AJ01). Measurements of angular distributions and differential cross sections at E_{p} = 29.1 and 35 MeV are reported in (1989BA88). See also (1988BAZH). For reaction (b) at E_{p} = 670 MeV see (1984AJ01). See also (1985NEZW).
A kinematically complete experiment is reported at E(^{3}He) = 120 MeV. The missing mass spectrum shows the groundstate peak and a 4 MeV wide bump at E_{x} ≈ 34 MeV, and some slight indication of a small bump at 22.0 ± 0.5 MeV (1985FR01).
See (1984KO25).
At E_{α} = 90 MeV differential cross sections have been measured for the transitions to ^{5}Li _{g.s.}+ ^{8}Li_{g.s.}: see (1984AJ01).
An angular distribution is reported at E_{d} = 13.6 MeV (1983DO10). See also (1984SHZJ).
At E(^{3}He) = 2.3 and 5.0 MeV the reaction is reported to proceed via ^{9}B*(4.9) to ^{5}Li_{g.s.} (1986AR14). See also (1988AR05) and ^{9}B in (1988AJ01).
