Coexistence of low-K oblate and high-K prolate g9/2 proton-hole bands in 115Sb

• DOI: 10.1016/j.physletb.2024.138565
• Publication Date: 2024-03-07T16:34:58Z
• Authors: Shabir Dar; S. Bhattacharyya; S. Chakraborty; S. Jehangir; Soumik Bhattacharya; G.H. Bhat; J.A. Sheikh; N. Rather; S.S. Nayak; Sneha Das; S. Basu; G. Mukherjee; S. Nandi; R. Banik; S. Basak; C. Bhattacharya; S. Chattopadhyay; S. Das Gupta; A. Karmakar; S.S. Ghugre; D. Kumar; D. Mondal; S. Mukhopadhyay; D. Pandit; S. Rajbanshi; R. Raut
• Keywords: Oblate spheroid

A positive parity sequence of ΔI=2 γ transitions has been identified above Iπ=9/2+ state (Ex=2019 keV) in 115Sb through in-beam ray spectroscopic technique. Rotational features this are found similar to a low-K decoupled band. Observation newly band, along with the earlier reported strongly coupled high-K band nucleus, provides first experimental evidence for prolate-oblate shape coexistence associated g9/2 proton-hole configuration around Z=50 shell closure. Experimental results reproduced reasonably well frameworks projected model and total Routhian surface calculations.