Level structure ofKr79andKr81

High spin states in ${}_{}{}^{79}{}_{}{}^{}\mathrm{Kr}$ and ${}_{}{}^{81}{}_{}{}^{}\mathrm{Kr}$ have been investigated via the ${}_{}{}^{76,78}{}_{}{}^{}\mathrm{Se}(\alpha , n){}_{}{}^{79,81}{}_{}{}^{}\mathrm{Kr}$ reactions using in-beam gamma-ray spectroscopy techniques. The decay schemes and decay properties for levels up to ∼3 MeV in excitation energy could be deduced from gamma ray yield data, obtained at bombarding energies between 10 and 18 MeV, $\gamma -\gamma$ coincidence and angular distribution measurements. Rotational-like band structures are observed in ${}_{}{}^{79}{}_{}{}^{}\mathrm{Kr}$ which are less apparent in ${}_{}{}^{81}{}_{}{}^{}\mathrm{Kr}$. Both nuclei show the presence of high-spin cascades based on the lowest ${\frac{9}{2}}^{+}$ excited level.