Rotational bands and signature inversion in odd-oddRe172

摘要: High-spin states in the odd-odd $^{172}\mathrm{Re}$ have been investigated via $^{149}\mathrm{Sm}(^{27}\mathrm{Al},4n\ensuremath{\gamma})^{172}\mathrm{Re}$ reaction through excitation functions, $x\text{\ensuremath{-}}\ensuremath{\gamma}$ and $\ensuremath{\gamma}\text{\ensuremath{-}}\ensuremath{\gamma}$ coincidence measurements. A level scheme consisting of three rotational bands has identified for first time extending high-spin studies $A\ensuremath{\sim}160$ nuclei to currently lightest rhenium isotope. The assigned be built on $\ensuremath{\pi}{h}_{11∕2}\ensuremath{\bigotimes}\ensuremath{\nu}{i}_{13∕2}$, $\ensuremath{\pi}{h}_{9∕2}\ensuremath{\bigotimes}\ensuremath{\nu}{i}_{13∕2}$, $\ensuremath{\pi}1∕{2}^{\ensuremath{-}}[541]\ensuremath{\bigotimes}\ensuremath{\nu}1∕{2}^{\ensuremath{-}}[521]$ configurations according their properties quasiparticle alignments, signature splitting, in-band $B(M1)∕B(E2)$ ratios, spacing systematics, band crossing frequencies, as well existing knowledge neighboring nuclei. Low-spin inversion confirmed two due observation at states. general features phenomenon semidecoupled are presented discussed with reference theoretical calculations plus rotor model including $p\text{\ensuremath{-}}n$ interactions.