T-band phenomena in $^{183}$Re

High-spin states in ${}^{183}$Re have been studied using the ${}^{176}$Yb($^{11}$B,4n) reaction at 52 and 57 MeV. Two high-$K$ bands have been observed directly by a time-correlated $\gamma$-$\gamma$ coincidence measurement. One of the bands is built on an isomeric $K^\pi=\frac{25}{2}^+$ state at $E_x = 1908$ keV with a half-life of 0.82(2) ms. The other band, assigned as $K^\pi=\frac{29}{2}^-$ at $E_x = 2739$ keV, decays to the $\frac{25}{2}^+$ band. These bands are interpreted as three-quasiparticle structures, $\pi\frac{5}{2}^+[402]$ $\otimes$ $\nu\frac{9}{2}^+[624]$ $ \otimes $ $\nu\frac{11}{2}^+[615]$ for the $\frac{25}{2}^+$ band and $\pi\frac{9}{2}^-[514]$ $ \otimes $ $\nu\frac{9}{2}^+[624]$ $ \otimes $ $\nu\frac{11}{2}^+[615]$ for the $\frac{29}{2}^-$ band. The $K^\pi =\frac{29}{2}^{-}$ band becomes strongly Coriolis mixed with increasing spin and is gradually changing into a low-$K$ s-band structure