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USNDP

9Li (1959AJ76)


(Not illustrated)

Mass of 9Li: From the threshold for 9Be(d, 2p)9Li, Ed = 19 ± 1 MeV (1951GA30), the mass excess of 9Li is determined as M - A = 28.1 ± 1 MeV.

1. 9Li(β-)9Be* → 8Be + n Qm = 12.4

9Li decays to excited states of 9Be which decay by neutron emission. The mean of the reported half-lives is 0.169 ± 0.003 sec (1951GA30, 1952HO25). See also (1952SH44, 1953FR03, 1955BE1E, 1956FL1A, 1958TA04).

2. 9Be(d, 2p)9Li Qm = -15.5

The threshold is 19 ± 1 MeV (1951GA30).

3. 11B(γ, 2p)9Li Qm = -31.4

See (1952SH44, 1958TA04).

4. 12C(γ, 3p)9Li Qm = -47.3

See (1953RE19, 1958TA04).

The following reactions are not reported: 7Li(t, p)9Li (Qm = -2.9), 9Be(n, p)9Li (Qm = -13.3), 9Be(t, 3He)9Li (Qm = -14.1) and 11B(n, 3He)9Li (Qm = -23.6).