Comment on the evidence for a monopole resonance at approximately 20 MeV inNi58

Small-angle inelastic $\alpha$ scattering data for ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$ at 129 MeV have been reanalyzed with the giant resonance peak parameters suggested by Bertrand et al. The two components of the giant resonance peak, assumed by them to correspond to $L=0\mathrm{}$ and $L=2\mathrm{}$, respectively, are found to have similar angular distributions between 0°-8° where large differences between these multipolarities should exist. This is not in agreement with their interpretation of ($p$,$p^{\prime }$) and large-angle ($\alpha$,${\alpha }^{\prime }$) data wherein a concentration of $L=0\mathrm{}$ strength was suggested at 20 MeV in ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$. Their data for the assumed $L=0\mathrm{}$ component are shown in our analysis to be consistent with an $L=2\mathrm{}$ transfer.