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20Na (83AJ01)


(See Energy Level Diagrams for 20Na)

GENERAL: See also (78AJ03) and Table 20.36 [Table of Energy Levels] (in PDF or PS).

(SI77D, WO78F, BE79A, OK80, AY81).

J = 2 (SC75M);

μ = 0.3694 ± 0.0002 nm (SC75M).

1. 20Na(β+)20Ne Qm = 13.887

20Na decays by positron emission to 20Ne*(1.63) and to a number of other excited states of 20Ne: see Table 20.33 (in PDF or PS) and reaction 63 in 20Ne. The half-life of 20Na is 446 ± 3 msec; Jπ = 2+: see (78AJ03).

2. 16O(12C, 8Li)20Na Qm = -32.528

See (RA79C).

3. 20Ne(p, n)20Na Qm = -14.669

Neutron groups have been observed at Ep = 22.9 MeV to states with Ex < 1.4 MeV: see Table 20.40 (in PDF or PS) in (78AJ03).

4. 20Ne(3He, t)20Na Qm = -13.906

Triton groups have been observed at E(3He) = 32 MeV to nine states of 20Na: see Table 20.40 (in PDF or PS) in (78AJ03).
5. 20Mg(β+)20Na Qm = 10.724

The first 0+; T = 2 state in 20Na is reported at Ex = 6.57 ± 0.05 MeV. It decays by proton emission: see 20Mg.