Alignment properties of the g7/2 and d5/2 bands in 125Cs

Abstract： High-spin states in the Z=55 125Cs isotope have been investigated by means of standard in-beam gamma-ray spectroscopy. Gamma-gamma coincidences were measured and a more complete level scheme of 125Cs is constructed. The bands based on the g7/2 and d5/2 configurations at low spins are extended up to spins where they are crossed by two high-lying three-quasiparticle bands. Possible configurations of the three-quasiparticle bands are discussed in the framework of cranked-shell-model calculations and are suggested to be associated with prolate and oblate shapes. In the prolate band, the alignment is assigned to h11/2 neutrons, whereas in the oblate band the alignment of h11/2 protons followed by the alignment of h11/2 neutrons are suggested.