High-spin states in ${}^{73}\mathrm{Kr}$ were studied at the XTU tandem accelerator of the Laboratori Nazionali di Legnaro using the reaction ${}^{40}\mathrm{Ca}$(${}^{40}\mathrm{Ca}$,$\alpha 2\mathit{pn}$) at a beam energy of 185 MeV. Gamma rays were detected with the EUROBALL spectrometer. Particle detection enabled us to identify the reaction channel leading to ${}^{73}\mathrm{Kr}$. The yrast bands of positive and negative parity were established up to probable spins of $61/2^{+}$ and $63/2^{-}$, respectively. The energies of the two identified bands agree well with the predictions of the configuration-dependent Cranked Nilsson-Strutinsky approximation and indicate that the nucleus remains collective up to the maximum spins of the respective high-spin configurations. The positive-parity band represents one of the rare cases where band non-termination at the highest spin of the configuration could be established experimentally.

• Received 16 February 2010

DOI:https://doi.org/10.1103/PhysRevC.81.054307