An isospin coupled-channels analysis of sub-Coulomb-proton-absorption cross sections has been performed for ${}_{}{}^{92,94,96}{}_{}{}^{}\mathrm{Zr}$ and ${}_{}{}^{94,96,98,100}{}_{}{}^{}\mathrm{Mo}$. Introduction of coupling to the channel consisting of a neutron plus the isobaric analog of the target is shown to shift and damp the single-particle resonances, in addition to giving rise to isobaric-analog resonances. In spite of these effects due to the coupling, large variations in the absorptive potentials were still required to fit measured ($p, n$) cross sections. ${}_{}{}^{96}{}_{}{}^{}\mathrm{Zr}(p, n)$ and ${}_{}{}^{100}{}_{}{}^{}\mathrm{Mo}(p, n)$ cross sections were measured and analyzed with a standard optical model for this work. Other $\mathrm{Zr}(p, n)$ and $\mathrm{Mo}(p, n)$ cross sections were taken from previous results.

NUCLEAR REACTIONS ${}_{}{}^{96}{}_{}{}^{}\mathrm{Zr}$, ${}_{}{}^{100}{}_{}{}^{}\mathrm{Mo}(p, n)$; $E_p=2.0-6.5\mathrm{}$ MeV; measured total $\sigma \mathrm{}\left(E\right)\mathrm{}$. Lane-model coupled channels analysis ${}_{}{}^{92,94,96}{}_{}{}^{}\mathrm{Zr}$ and ${}_{}{}^{94,96,98,100}{}_{}{}^{}\mathrm{Mo}$ proton-absorption cross sections, deduced absorptive potential strengths.

• Received 28 June 1982

DOI:https://doi.org/10.1103/PhysRevC.26.1744