Isobaric Analogue States in Heavy Nuclei. IV. Samarium Isotopes

Abstract

Isobaric analogue resonances in the target-nucelus-plus-proton system have been studied for the target nuclei of ${\mathrm{Sm}}^{144}$, ${\mathrm{Sm}}^{148}$, ${\mathrm{Sm}}^{150}$, ${\mathrm{Sm}}^{152}$, and ${\mathrm{Sm}}^{154}$. All resonances were observed via elastic proton scattering, while some resonances for the target nuclei of ${\mathrm{Sm}}^{144}$ and ${\mathrm{Sm}}^{148}$ were also observed via ($p,n$) reactions. The low-lying resonances have been analyzed using a single-resonance formula yielding the various resonance parameters. Results are compared with ($d,p$) and other studies on the neutron-plus-target analogue states. Coulomb displacement energies are presented.