Structure of the negative parity bands in (125)Xe

Abstract

The high-spin structures of (125)Xe were studied by using in-beam gamma-ray spectroscopy with the (116)Cd ((13)C, 4n) (125)Xe reaction at E(lab)=62 MeV. The level scheme of (125)Xe was constructed through the gamma-gamma coincidences and gamma-gamma angular directional correlation ratios. Several negative parity bands built on the neutron h(11/2) orbital were identified. In contrast to the yrast h(11/2) band with a large signature splitting, the second (yrare) h(11/2) band exhibits a small signature splitting, showing signature inversion below I(pi)=23/2(-). In addition, a band built on the 27/2(-) level at 3619 keV was newly observed and found to be associated with a three quasiparticle alignment based on a neutron in the h(11/2) orbital coupled to a pair of protons in the h(11/2) orbital, namely, the nu[h(11/2)]pi[(h(11/2))(2)] configuration.