Observation of weakγ-ray transitions inCr52using an efficient isotope identification technique for fusion-evaporation reactions

Gamma-ray transitions in ${}_{}{}^{52,53}{}_{}{}^{}\mathrm{Cr}$ and ${}_{}{}^{54,55}{}_{}{}^{}\mathrm{Mn}$ have been observed using ${}_{}{}^7{}_{}{}^{}\mathrm{Li}({}_{}{}^{51}{}_{}{}^{}\mathrm{V},x\mathrm{n}y\mathrm{p}z\alpha \gamma )$ fusion-evaporation reactions and $\gamma$-particle coincidence techniques. The experiment involved the same reaction at the same center-of-mass energy as the earlier work of Poletti et al., but with target and projectile interchanged. In the present work, eight additional transitions have been identified as occurring in ${}_{}{}^{52}{}_{}{}^{}\mathrm{Cr}$. This provides corroboration of results obtained more recently via ${}_{}{}^{50}{}_{}{}^{}\mathrm{Ti}(\alpha ,2\mathrm{}\mathrm{n}\gamma ){}_{}{}^{52}{}_{}{}^{}\mathrm{Cr}$ reaction studies. A simple, efficient approach to the spectroscopy of weakly populated nuclear states which provides for unambiguous isotopic assignments is thus demonstrated.