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9Li (84AJ01)


(See Energy Level Diagrams for 9Li)

GENERAL: See also (79AJ01).

Model calculations: (LA79G).

Complex reactions involving 9Li: (DU78H, AL79N, BO79GG, JA79I, BO80T, WI80N, BO81Y, MO81N, BO82R).

Muon and neutrino capture and reactions: (MU80A).

Reactions involving pions and other mesons (See also reaction 3.): (FU78G, BO79EE, PE79A, WI79D, NI80A, ST80D, YA81).

Hypernuclei: (DA78S, PO78A, MA80DD, ST81H, WA81D, KO82N).

Other topics: (BE79A, LA79G, NG82).

Ground-state properties of 9Li: (AV81B, NG82).

μ = 3.4391 ± 0.0006 nm: see (CO83D)
Q = 0.88 ± 0.18Q(7Li): see (CO83D).

1. 9Li(β-)9Be Qm = 13.606

The half-life of 9Li is 178.3 ± 0.4 msec (AL76). See also (79AJ01). 9Li decays to a number of states in 9Be: see reaction 12 in 9Be and Table 9.7 (in PDF or PS). The nature of the decay to 9Be*(0, 2.43) with Jπ = 3/2-, 5/2- is evidence for Jπ = 3/2- for 9Lig.s.. The probablility for delayed neutron decay, Pn, is (49.5 ± 5)% (LA81G): see Table 9.7 (in PDF or PS).

2. 7Li(t, p)9Li Qm = -2.386

Protons are observed to excited states at Ex = 2.691 ± 0.005 MeV (MI64E), 4.31 ± 0.03, 5.38 ± 0.06 and 6.41 ± 0.02 MeV (YO71B) [Γc.m. = 250 ± 30, 600 ± 100, < 100 keV], 4.31 ± 0.02 and 6.435 ± 0.020 MeV (AJ78A) [Γc.m. = 100 ± 30, 40 ± 20 keV]. Angular distributions are reported at Et = 11.3 (MI64E; t0), 15 MeV (YO71B: t0, t2, t4) and at 23 MeV (AJ78A: t0, t1, t2, t4). They are consistent with Jπ = 3/2-, (1/2-) and >/= 9/2 for 9Li*(0, 2.69, 6.43) (AJ78A). See also (AB79G, AB80E, CO83H) and 10Be.

3. 9Be(γ, π+)9Li Qm = -153.174

At Eγ = 175, 187, 200 MeV, the cross section for production of 9Lig.s. at θπ = 90° has been measured by (TE82). See also (BO79EE, NI80A).

4. 9Be(n, p)9Li Qm = -12.824

See (BR81H) and (79AJ01).

5. 9Be(7Li, 7Be)9Li Qm = -14.468

See (AL82B: E(7Li) = 78 MeV).

6. 11B(6Li, 8B)9Li Qm = -25.121

At E(6Li) = 80 MeV the angular distribution to 9Lig.s. has been measured. States at Ex = 2.59 ± 0.10, 4.36 ± 0.10 and 6.38 ± 0.12 MeV are also populated (WE77A, WE77).