
^{9}Li (1988AJ01)(See Energy Level Diagrams for ^{9}Li) GENERAL: See also (1984AJ01) and Table 9.1 [Table of Energy Levels] (in PDF or PS). Model calculations: (1983KU17, 1984CH24, 1984VA06). Special states: (1983KU17, 1984VA06). Electromagnetic interactions: (1983KU17). Astrophysical questions: (1987MA2C). Complex reactions involving ^{9}Li: (1983OL1A, 1983WI1A, 1984GR08, 1985JA18, 1985MA02, 1985MO17, 1986CS1A, 1986HA1B, 1986SA30, 1986WE1C, 1987BA38, 1987CH26, 1987JA06, 1987KO1Z, 1987SH1K, 1987TAZU, 1987WA09, 1987YA16, 1988CA06, 1988RU01, 1988ST06, 1988TA1A). Reactions involving pions and other mesons (See also reactions 3 and 4.): (1985PN01). Hypernuclei: (1982KA1D, 1983FE07, 1984AS1D, 1985PN01, 1986DA1B, 1986KO1A, 1986ME1F, 1987MI38, 1987PO1H, 1987WA36, 1988TA29). Other topics: (1985AN28, 1985PO10, 1986AN07, 1987BA1I). Groundstate properties of ^{9}Li: (1983ANZQ, 1984CH24, 1985AN28, 1985SA32, 1987HA30, 1988JO1C, 1988POZS, 1988VA03).
Q = (0.88 ± 0.18) Q of ^{7}Li (1983CO11). [A preliminary report by (1988ARZU) gives Q = (0.69 ± 0.03) × Q(^{7}Li).] The interaction nuclear radius of ^{9}Li is 2.41 ± 0.02 fm (1985TA18). [See also for derived nuclear matter, charge and neutron matter r.m.s. radii.]
The halflife of ^{9}Li is 178.3 ± 0.4 msec: see (1979AJ01). See also (1986CU01, 1988SA04). ^{9}Li decays to a number of states in ^{9}Be: see reaction 12 in ^{9}Be and Table 9.7 (in PDF or PS). The nature of the decay to ^{9}Be*(0, 2.43) with J^{π} = 3/2^{}, 5/2^{} is evidence for J^{π} = 3/2^{} for ^{9}Li_{g.s.}. The probability for delayed neutron decay, P_{n}, is (49.5 ± 5)%: see (1984AJ01). See also (1986RO27), (1985HA1K) and (1983KU17; theor.).
Protons are observed to excited states at E_{x} = 2.691 ± 0.005, 4.31 ± 0.02, 5.38 ± 0.06 and 6.430 ± 0.015 MeV. The widths of the three highest states, which are unbound, are 100 ± 30, 600 ± 100 and 40 ± 20 keV, respectively. Angular distributions have been studied at E_{t} = 11.3, 15 and 23 MeV. At the highest energy they are consistent with J^{π} = 3/2^{}, 5/2^{} is evidence for J^{π} = 3/2^{}, 1/2^{} and ≥ 9/2 for ^{9}Li*(0, 2.69, 6.43): see (1979AJ01). See also (1984AJ01) and ^{10}Be.
The angular distribution of the π^{+} to ^{9}Li_{g.s.} has been measured at E_{e} = 200 MeV (1983SH19). For the earlier work see (1984AJ01).
Capture branching ratios to ^{9}Li*(0, 2.69) are reported by (1986PE05).
See (1984GL06: E(^{7}Li) = 78 MeV).
At E(^{6}Li) = 80 MeV the angular distribution to ^{9}Li_{g.s.} has been measured. States at E_{x} = 2.59 ± 0.10, 4.36 ± 0.10 and 6.38 ± 0.12 MeV are also populated: see (1979AJ01).
