Isobaric analog resonances in the 82se+p system investigated by (p, p'γ) angular correlations and low-lying states in 83Se

Abstract

Low-lying states in 83Se have been studied through proton-induced isobaric analog resonance (IAR) reactions. Excitation functions for elastic and inelastic proton scattering were measured in the bombarding energy range 4.5– to 7.7 MeV. Angular distributions of proton inelastic scattering cross sections for the reaction 82Se(p, p') 82Se(0.655 MeV 2 +) and angular correlations of the inelastic protons and the associated 2 +-0 + de-excitation γ-rays were measured on observed resonance peaks. In the analysis for the inelastic scattering, direct reaction contributions to the IAR were taken into account. Correlations between the low-lying states in 83Se and the excited 2 + core state are discussed.