${}^{167}\mathrm{Hf}$ was populated at low and high spins via the heavy-ion fusion reactions ${}^{155}\mathrm{Gd}{(}^{16}\mathrm{O},4n)$ at 85 MeV and ${}^{146}\mathrm{Nd}{(}^{26}\mathrm{Mg},5n)$ at 142 MeV, respectively. Seven rotational bands were observed; four of them are new, and the known bands are extended to much higher spin. A total Routhian surface plus a cranked shell-model calculation enabled quasiparticle configurations to be assigned to the respective bands via comparison with the extracted alignment gains and Routhians from experiment. Evidence is presented for the observation of a quasiproton crossing at $ħ\omega =0.51\mathrm{}\hspace{0.5em}\mathrm{MeV}$ in ${}^{167}\mathrm{Hf}.$ The $\gamma$-ray flux appears to fractionate above this frequency.

• Received 16 November 1998

DOI:https://doi.org/10.1103/PhysRevC.59.2406