Observation of multiple doubly degenerate bands in 195Tl

The High-spin states in Tl-195, populated through the Re-185,Re-187(C-13, xn) fusion evaporation reaction at the beam energy of 75 MeV, were studied using the Indian National Gamma Array (INGA). More than 50 new gamma transitions have been placed in the proposed level scheme which is extended up to the excitation energy of approximate to 5.6 MeV and spin = 22.5 (h) over bar. Two pairs of degenerate bands based on two different quasiparticle configurations have been identified in this nucleus indicating the first observation of such bands in an odd-A nucleus in A similar to 190 region and signify the first evidence of multiple chiral bands in a nucleus in this region. The total Routhian surface calculations predict triaxial shapes for both the configurations and thereby, support the experimental observation. The importance of multiple neutron holes in the i(13/2) orbital and the stability of shapes for these two configurations have been discussed. (C) 2018 The Author(s). Published by Elsevier B.V.