Quantum Phase Transitions in Odd-Mass Nuclei

TL;DR

This paper explores how odd fermions affect quantum shape-phase transitions in odd-even nuclei, using the interacting boson-fermion model, and provides experimental evidence for shape transitions in specific odd-proton nuclei.

Contribution

It demonstrates the significant influence of odd fermions on the location and nature of quantum phase transitions in odd-mass nuclei, combining theoretical analysis with experimental data.

Findings

Odd fermions strongly influence phase transition characteristics.

Experimental evidence of spherical to deformed transitions in Pm, Eu, Tb.

The presence of the odd fermion shifts the critical point of the transition.

Abstract

Quantum shape-phase transitions in odd-even nuclei are investigated in the framework of the interacting boson-fermion model. Classical and quantum analysis show that the presence of the odd fermion strongly influences the location and nature of the phase transition, especially near the critical point. Experimental evidence for the occurrence of spherical to axially-deformed transitions in odd-proton nuclei Pm, Eu and Tb (Z=61, 63, 65) is presented.