Yrast decay schemes from heavy-ion +Ca48fusion-evaporation reactions. III.Fe57,58,Cr54,55, andMn57,58

Fusion-evaporation reactions induced by beams of 25-65 MeV ${}_{}{}^{13}{}_{}{}^{}\mathrm{C}$, ${}_{}{}^{15}{}_{}{}^{}\mathrm{N}$, ${}_{}{}^{11}{}_{}{}^{}\mathrm{B}$, and ${}_{}{}^9{}_{}{}^{}\mathrm{Be}$ on an isotopically enriched ${}_{}{}^{48}{}_{}{}^{}\mathrm{Ca}$ target have been used to populate high-spin yrast levels in ${}_{}{}^{57,58}{}_{}{}^{}\mathrm{Fe}$, ${}_{}{}^{54,55}{}_{}{}^{}\mathrm{Cr}$, and ${}_{}{}^{57,58}{}_{}{}^{}\mathrm{Mn}$. Measurements consisted of $\gamma$-ray excitation functions, angular distributions, $\gamma -\gamma$ coincidences, and recoildistance and Doppler shift lifetime measurements, from which were deduced the energy levels, $\gamma$-ray branching ratios, most probable spin-parity assignments, and level lifetimes. Comparision is made with a large-basis shell-model calculation.