Energy Levels of ^<40>Ca Studied by the ^<39>K(p,α_0)^<36>Ar Reaction

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Resonances in the ^<39>K(p,α_0)^<36>Ar reaction were investigated. In the energy region Ep=3.05-4.20 MeV, 102 resonances were observed. Resonance energies, strengths and widths are reported. The angular distributions were measured at 37 resonance energies, and the analysis by the one-level formula allowed unque assignment of the spins for 17 cases. In 18 cases, two or more different spin assignments were possible. An experimental level density of ^<40>Ca was estimated to be p_<exp>=131 MeV^<-1> at the excitation energy E_x=11.87 MeV. By the smoothing procedure of the excitation function, a broad resonance with the width of about 400 keV was obtained at Ep=3.45 MeV. An average alpha-paricle reduced width in this reaction was estimated to be about 0.02×h^2/MR^2.
社団法人日本物理学会の論文
1974-01-15