Compound States of the SystemNi58+p

A ${\mathrm{Ni}}^{58}$ target was bombarded by protons from 2 to 5 Mev in energy. Approximately 70 resonances were observed in the yield of the $\gamma$ radiation due to inelastic scattering from the state at 1.45 Mev. Angular distributions were obtained for this radiation at 37 resonances. Nineteen of the distributions are consistent with a $\frac{5}{2^{+}}$ assignment and seventeen fit a $\frac{3}{2}$ assignment, while one distribution was isotropic. All the resonances observed had a width no greater than the target thickness of 4 kev. Absolute yields for the reaction have been determined. The level spacing for states formed by $d$-wave protons was found to be approximately 30 kev in the region studied. An estimate of the value of $\frac{{〈{\gamma }^2〉}_{\mathrm{Av}}}{\overline{D}}$ for these resonances gives 1.4×${10}^{-14\mathrm{}}$ cm. In order to determine the energies of excitation in ${\mathrm{Cu}}^{59}$, to which these resonances would correspond, the end point of the ${\mathrm{Cu}}^{59}$ beta spectrum was measured, and found to be 3.75±0.1 Mev. This puts the range of excitation for the resonances observed between 6.3 and 7.9 Mev.