Properties of levels in ${}_{}{}^{54}{}_{}{}^{}\mathrm{Mn}$ have been studied using the reaction ${}_{}{}^{54}{}_{}{}^{}\mathrm{Fe}(n,p\gamma ){}_{}{}^{54}{}_{}{}^{}\mathrm{Mn}$. These data alone were not sufficient to determine spin and parity assignments, but when correlated with data from prior experimental investigations of the ${}_{}{}^{54}{}_{}{}^{}\mathrm{Mn}$ nucleus, a set of unique $J^{\pi }$ assignments for the lowest five excited states was determined. These assignments are consistent with nearly all presently available experimental data and are in good agreement with shell-model calculations. The level excitation energies and $J^{\pi }$ values obtained are: ground state, $3^{+}$; 54.3 keV, $2^{+}$; 156.9 keV, $4^{+}$; 367.6 keV, $5^{+}$; 407.5 keV, $3^{+}$; and 839.0 keV, $4^{+}$. Transitions from higher-lying states were observed and possible $J^{\pi }$ values were obtained.

• Received 18 January 1972

DOI:https://doi.org/10.1103/PhysRevC.5.1977