Study of the ReactionFe56(p, n)Co56to the Antianalog State

The reaction ${}_{}{}^{56}{}_{}{}^{}\mathrm{Fe}(p, n){}_{}{}^{56}{}_{}{}^{}\mathrm{Co}$ was studied at $E_p=22.8\mathrm{}$ MeV for both the isobaric-analog-state (IAS) and antianolog-state (AAS) transitions. The difference in the observed angular distributions for these two $L=0\mathrm{}$ transitions is not as striking as in (${}_{}{}^3{}_{}{}^{}\mathrm{He}$, $t$) measurements. The strong cancelation expected for the AAS case was observed. The shapes of the angular distributions for both the IAS and AAS were improved by inclusion of a coherent twostep ($p, d$) ($d, n$) process.