Excited states in 125Xe

High-spin spectroscopy inXe125

“…Many of the known bands have been considerably extended in spin, and a few new medium-spin band structures have also been established. We have been able to confirm most of the previous spin and parity determinations [1] and to firmly determine spin and parity for bands 5,6 and 7,8, for which Refs. [1,3] had different tentative suggestions.…”

“…We have been able to confirm most of the previous spin and parity determinations [1] and to firmly determine spin and parity for bands 5,6 and 7,8, for which Refs. [1,3] had different tentative suggestions. In the following, we give experimental arguments for spin and parity of the low-spin bands 5 -8 and 13,14 and their extensions.…”

“…The labeling of the level structures in 125 Xe previously identified, vary from one author to the next and we have chosen to relate our labeling to the one of Granderath [1] The long bands identified to very high spins are new in the present study and are labeled L1 to L6. Many of the known bands have been considerably extended in spin, and a few new medium-spin band structures have also been established.…”

“…The level structure of 125 Xe at low spin and excitation has been studied in detail previously both experimentally and theoretically [1][2][3][4][5]. The most outstanding features of the structure is a γ softness at low and moderate spin and a large susceptibility to polarization effects from the excitation of quasiprotons and quasineutrons.…”

“…The deformation driving properties of neutrons and protons are, therefore, conflicting and the nucleus may adopt either a prolate, oblate or triaxial shape, depending on the intrinsic configuration. A substantial amount of spectroscopic data has been provided at low and moderate spin for 125 Xe and neighboring nuclei concerning normal deformed (ND) nuslear shapes [1,3,5], but recent experiments at extreme spins, with the aim of identifying hyperdeformation, have given a wealth of new information. It has been shown that beyond roughly 20 units of angular momentum, the irregular structures typical for rapid changing shapes, become dominated by regular band structures extending another 20 to 30 units of spin [6].…”