Information on mass chains and nuclides available on this website:

WWW TUNL

GENERAL: See (GR64C).

See also Table 9.1 [Table of Energy Levels] (in PDF or PS).

Mass of ⁹Li: From the Q-value for ⁷Li(t, p)⁹Li: Q = -2.397 ± 0.020 MeV, the mass excess of ⁹Li is 24.965 ± 0.020 MeV (MI64E, MA65A).

1. 9Li(β-)9Be

Qm = 13.615

⁹Li decays to the ground state (25 ± 15 %) and to the 2.43 MeV, neutron-unstable state of ⁹Be (75 ± 15 %). The β-endpoints are 13.5 ± 0.3 MeV and 11.0 ± 0.4 MeV; log ft = 5.5 ± 0.2 and 4.7 ± 0.2, respectively. Delayed neutrons of energy 0.7 ± 0.2 MeV are associated with the 11 MeV branch; there are indications of a weak neutron group with E_n ~ 3 - 4.5 MeV (AL63F). (NE63C) finds E_β(max) = 13.1 ± 0.5 MeV, log ft = 5.0 ± 0.3. The mean of reported half lives is 172 ± 3 msec (GA51C, HO52B, SH52, HI61, AL63F, BE65). The fact that the decay to ⁹Be(3/2^-) is allowed indicates J^π(⁹Li) = 1/2^-, 3/2^- or 5/2^-; if ⁹Be*(2.43) has J^π = 5/2^-, the allowed decay excludes 1/2^- (AL63F). See also (ER64A).

2. 7Li(t, p)9Li

Qm = -2.397

At E_t = 11.28 MeV, two groups are observed: the ground state group yields Q₀ = -2.397 ± 0.020 MeV. The first excited state has E_x = 2.691 ± 0.005 MeV; no other states are seen with E_x < 4.0 MeV. The angular distribution of ground-state protons appears to require L = 0 and L = 2 transfer, consistent with the expected J^π = 3/2^- (MI64E). See also (HI61, RO64H).

3. 9Be(n, p)9Li

Qm = -12.832

See (AL59A, AL63F).

4. 9Be(d, 2p)9Li

Qm = -15.057

See (GA51C).

5. 9Be(t, 3He)9Li

Qm = -13.596

Not observed.

6. (a) 11B(γ, 2p)9Li	Qm = -30.875
(b) 11B(p, 3p)9Li	Qm = -30.875

See (SH52, TA58B, NE63C) for reaction (a), and (BE65) for (b).

7. 11B(n, 3He)9Li

Qm = -23.157

Not observed.

8. 12C(γ, 3p)9Li

Qm = -46.832

See (RE53, TA58B).