Intertwined quantum phase transitions in odd-mass Nb isotopes

Abstract

A detailed analysis of odd-mass Nb isotopes, in the framework of the interacting boson-fermion model with configuration mixing, discloses the effects of an abrupt crossing of states in normal and intruder configurations (Type~II QPT), on top of which superimposed a gradual evolution from spherical- to deformed-core shapes within the intruder configuration (Type~I QPT). The pronounced presence of both types of QPTs demonstrates, for the first time, the occurrence of intertwined QPTs in odd-mass nuclei.Comment: 5 pages, 5 figures, Proceedings 17th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics (CGS17), July 17-21, 2023, Grenoble, Franc