期刊
PHYSICS LETTERS B
卷 829, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.physletb.2022.137099
关键词
Shape coexistence; Covariant density functional theory
资金
- Tenure Track Pilot Programme of the Croatian Science Foundation
- Ecole Polytechnique Federale de Lausanne [TTP-2018-07-3554]
- Bulgarian National Science Fund (BNSF) [KP-06-N48/1]
A microscopic explanation of shape coexistence in the N=90, Z=64 region is proposed based on calculations of single particle energies. It is suggested that the coexistence is caused by the protons, which trigger stronger proton-neutron interaction and result in the shape/phase transition from spherical to deformed nuclei.
A microscopic explanation of the nature of shape coexistence in the N=90, Z=64 region is suggested, based on calculations of single particle energies through standard covariant density functional theory. It is suggested that shape coexistence in the N=90 region is caused by the protons, which create neutron particle-hole (p-h) excitations across the N=112 3-dimensional isotropic harmonic oscillator (3D-H0) magic number, signaling the start of the occupation of the 1i13/2 intruder orbital, which triggers stronger proton-neutron interaction, causing the onset of the deformation and resulting in the shape/phase transition from spherical to deformed nuclei described by the X(5) critical point symmetry. A similar effect is seen in the N=60, Z=40 region, in which p-h excitations across the N=70 3D-HO magic number occur, signaling the start of the occupation of the 1h11/2 intruder orbital. (C) 2022 The Author(s). Published by Elsevier B.V.
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