Negative-parity high-spin states and a possible magnetic rotation band inPr7659135

Abstract

Excited states in $^{135}\mathrm{Pr}$ have been investigated using the reaction $^{123}\mathrm{Sb}(^{16}\mathrm{O},4n)^{135}\mathrm{Pr}$ at an incident beam energy of 82 MeV. The partial level scheme has been established for negative-parity states with addition of new $\ensuremath{\gamma}$-ray transitions. The directional correlation and polarization measurements have been performed to assign spin parity for most of the reported $\ensuremath{\gamma}$-ray transitions. At high spin, a negative-parity dipole band $(\mathrm{\ensuremath{\Delta}}I=1)$ has been reported along with the observation of new crossover $E2$ transitions. Tilted Axis Cranking (TAC) calculations have been performed by considering a three-quasiparticle (3qp) configuration $\ensuremath{\pi}{({h}_{11/2})}^{1}\ensuremath{\bigotimes}\ensuremath{\nu}{({h}_{11/2})}^{\ensuremath{-}2}$ and a five-quasiparticle (5qp) configuration $\ensuremath{\pi}{({h}_{11/2})}^{1}{({g}_{7/2})}^{2}\ensuremath{\bigotimes}\ensuremath{\nu}{({h}_{11/2})}^{\ensuremath{-}2}$ for the lower and upper parts of the band, respectively. The observed results are compared with the results of the theoretical (TAC) calculations.