# Role of octupole shape degree of freedom in neutron-rich odd-mass xenon isotopes

Source: [Role of octupole shape degree of freedom in neutron-rich odd-mass xenon isotopes](<https://www.sota2.com/research/paper/68fa48ae1e209131ce9314f8>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-25T06:57:36.865Z

Authors: K. Nomura

Published: 2024-11-02T14:27:45.000Z

## Abstract

Influences of the octupole shape degree of freedom on low-energy spectra of neutron-rich odd-mass xenon isotopes are studied within the interacting boson-fermion model that is based on the nuclear density functional theory. The interacting-boson Hamiltonian describing low-energy quadrupole and octupole collective states of the even-even nuclei $^{140,142,144}$Xe, single-particle energies, and occupation probabilities for an unpaired neutron in the odd-mass nuclei $^{141,143,145}$Xe, are determined based on the axially symmetric quadrupole-octupole deformation-constrained self-consistent mean-field calculations with a choice of the energy density functional and pairing interaction. Strength parameters of the boson-fermion interactions are empirically determined to reproduce a few low-lying levels of each odd-mass nucleus. The mean-field calculation predicts for $^{142}$Xe a potential energy surface that is notably soft in the octupole deformation with a non-zero octupole global minimum. The octupole correlations are shown to be relevant in positive-parity excited states of $^{143,145}$Xe.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/2411.01262>)

[PDF](<https://arxiv.org/pdf/2411.01262.pdf>)