Study of Analog States by the (p, n) Reaction

Abstract

Isobaric-analog states were studied by measuring the total neutron yield from the ($p, n$) reaction on ${}_{}{}^{65}{}_{}{}^{}\mathrm{Cu}$, ${}_{}{}^{70}{}_{}{}^{}\mathrm{Zn}$, ${}_{}{}^{74}{}_{}{}^{}\mathrm{Ge}$, ${}_{}{}^{76}{}_{}{}^{}\mathrm{Ge}$, ${}_{}{}^{75}{}_{}{}^{}\mathrm{As}$, and ${}_{}{}^{80}{}_{}{}^{}\mathrm{Se}$. A large number of resonances were observed, and total widths extracted for approximately 50 of these resonances. Detailed comparison is made with the level schemes of nuclei formed by ($d, p$) reactions on the same targets. Coulomb displacement energies were extracted for all isotopes studied.