Gamma-Ray Spectra ofCo60andMn56Following Resonance-Neutron Capture inCo59andMn55

The gamma-ray spectra resulting from neutron capture in the 132-eV resonance of ${\mathrm{Co}}^{59}$ and the 336-, 1098-, and 2355-eV resonances of ${\mathrm{Mn}}^{55}$ have been observed with a Ge(Li) spectrometer at the Argonne fast-chopper time-of-flight system. The spectra are compared with the thermal-capture spectra and with the proton spectra observed in deuteron stripping. The reduced gamma-ray width for transitions in ${\mathrm{Co}}^{60}$ exhibit a dependence on the $l_n$ value of the corresponding ($d,p$) transitions. The thermal and two higher-energy resonance spectra in ${\mathrm{Mn}}^{56}$ display significant correlation with the corresponding stripping strengths. No such correlation was observed for the 132-eV resonance in ${\mathrm{Co}}^{59}$ or the 336-eV resonance in ${\mathrm{Mn}}^{55}$.