Nuclear energy levels of 31S and 33C1
1970; Elsevier BV; Volume: 145; Issue: 2 Linguagem: Inglês
10.1016/0375-9474(70)90434-3
ISSN1873-1554
Autores Tópico(s)Nuclear Physics and Applications
ResumoThe reaction 32S(3He, α)31S has been used to locate 42 levels in 31S. For 11 of the first 17 levels ln values have been determined. The first 6 excited states of 31S have been studied by applying the particle-gamma correlation method of Litherland and Ferguson (method II) to the reaction 32S(3He, αγ)31S. The resulting spins and parities are: Ex, Jπ = 1.25 MeV, 3/2+; 2.23 MeV, 5/2+; 3.08 MeV, 1/2+; 3.29 MeV, 5/2+, (3/2+); 3.35 MeV, (7/2, 3/2); 3.44 MeV, 3/2+. Mixing and branching ratios have also been determined. The ground state Q-value for the reaction 32S(3He, α)31S has been measured to be 5.538±0.006 MeV. Analysis of the deuteron spectra of the reaction 32S(3He, d)33Cl located levels in 33C1 at the following excitation energies: 0, 810±9, (1978±14), 2351±9, 2686±8, 2848±9 (a known doublet), 2980±9and4119±10 keV. The 2.0 MeV level was only weakly populated, and to confirm its existence the reaction 36Ar(p, α)33Cl has been studied. In this reaction the 2.0 MeV level was strongly populated and the measured excitation energy was 1999±20 keV. Some levels populated by the reactions 34S(3He, α)33S and 34S(3He, d)35Cl were also observed. The experimental results for 31S and 33C1 are compared with their analogs and in the case of 33C1 with nuclear model predictions.
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