Effect of theΔ(1232)Isobar inCa48(p, n)Cross Sections

A fully microscopic analysis of the experimentally observed $1^{+}$ and $7^{+}$ ($p, n$) cross sections in ${}_{}{}^{48}{}_{}{}^{}\mathrm{Ca}$ is presented. Subnuclear $\Delta$-isobar degrees of freedom are treated explicitly in both the structure and reaction calculation. It is shown that the quenching due to the $\Delta$ isobars depends on the multipolarity of a given state.