Levels of 32S excited in the 28Si (α, γ) 32S and 31P(p, γ) 32S reactions

Abstract

Alpha-particle emitting levels of 32S, in the E, = 9- 10 MeV region, were studied by means of (α, γ) and (p, y) reactions. In the 28Si(α, γ)32S reaction, with α particles in the 2.0-3.3 MeV range, four resonances were observed, at E, = 2.618, 2.878, 2.904 and 3.162 MeV. The latter three correspond to 31P(p, y)32S resonances at E, = = 618.9, 642.1 and 875.5 keV. The spins and parities of the four resonant states, as determined by angular distribution and correlation measurements, are l-, 2+, l- and 2+, respectively. The (α, y) and (p, y) yields were also measured. From corresponding (α, y) and (p, y) resonance energies a Q value of 1919 & 4 keV is found for the 31P(p α)28Si reaction.