(See Energy Level Diagrams for 20Na)
20Na decays by positron emission to 20Ne*(1.63) and to a number of other excited states of 20Ne: see Table 20.26 (in PDF or PS) and reaction 53 in 20Ne. The half-life of 20Na is 447.9 ± 2.3 msec [weighted mean of values quoted in (1978AJ03) and in (1983CL01)]; Jπ = 2+: see (1978AJ03). See also (1986HO35).
Angular distributions and Ay have been studied at Epol. p = 199.6 MeV to 20Na*(0.74, 1.85, 3.01, 4.11) [probably unresolved]: it is suggested that the latter two have J = 6 or 7 (1987CA05).
(1986LA07) have calculated the reaction rates at stellar energies. They are higher than those previously estimated. The higher rate implies a greater production of intermediate A elements in the r-p process in stellar evolution. See also (1987LA14).
For observed neutron groups see Tables 20.40 (in PDF or PS) in (1978AJ03) and 20.27 (in PDF or PS) here. For preliminary work at Ep = 120 MeV see (1983DEZT). See also (1986BA16) and (1983KN05; theor.).
States derived from triton groups listed in Tables 20.40 (in PDF or PS) in (1978AJ03) and 20.27 (in PDF or PS) here: see, in particular, (1987LA14). [I am grateful to Professor M. Wiescher for communicating these results to me].
20Mg decays to 20Na*(6.57 ± 0.05) [Jπ = 0+; T = 2]. That state decays by proton emission: see 20Mg.
The Δ resonance is very strongly excited in this reaction at E(20Ne) = 950 MeV/A (1986BA16).