(See Energy Level Diagrams for 20Na)
GENERAL: See also (1978AJ03) and Table 20.36 [Table of Energy Levels] (in PDF or PS).
(1977SI1D, 1979BE1H, 1979WO07, 1980OK01, 1981AY01).
μ = 0.3694 ± 0.0002 nm (1975SC20).
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 (1978AJ03).
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 (1978AJ03).
Triton groups have been observed at E(3He) = 32 MeV to nine states of 20Na: see Table 20.40 (in PDF or PS) in (1978AJ03).
The first 0+; T = 2 state in 20Na is reported at Ex = 6.57 ± 0.05 MeV. It decays by proton emission: see 20Mg.