Angular-momentum conserved description of the proton decay from highly deformed 131Eu

Yeruoxi Chen; Q. B. Chen; C. Qi

doi:10.1016/j.physletb.2025.140106

Angular-momentum conserved description of the proton decay from highly deformed ¹³¹Eu

Yeruoxi Chen
, Q. B. Chen
, C. Qi^*

^*Corresponding author for this work

School of Physics and Electronic Science

East China Normal University
KTH Royal Institute of Technology
Academy of Romanian Scientists

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

We investigate proton emission from the highly deformed nucleus ¹³¹Eu within the angular-momentum-conserving core-quasiparticle coupling (CQPC) model. The calculations reproduce well the observed energy spectra and decay properties, and demonstrate that the dominant emitting configuration originates from the d _3/2 spherical component of a deformed configuration, consistent with experimental assignments. Complementary calculations for the triaxially deformed nucleus ¹⁴⁵Tm and the weakly deformed nucleus ¹⁵¹Lu further confirm that the CQPC framework provides a unified and reliable description of proton emission across a wide deformation range. The results highlight the importance of coherent single-particle-collective coupling in shaping proton decay from deformed nuclei beyond the drip line and provide a fresh perspective on the interpretation of decays traditionally assigned to deformed Nilsson orbitals.

Original language	English
Article number	140106
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	872
DOIs	https://doi.org/10.1016/j.physletb.2025.140106
State	Published - Jan 2026

Keywords

Angular-momentum conserved
Core-quasiparticle coupling model
Spectroscopic factor

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10.1016/j.physletb.2025.140106

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title = "Angular-momentum conserved description of the proton decay from highly deformed 131Eu",

abstract = "We investigate proton emission from the highly deformed nucleus 131Eu within the angular-momentum-conserving core-quasiparticle coupling (CQPC) model. The calculations reproduce well the observed energy spectra and decay properties, and demonstrate that the dominant emitting configuration originates from the d 3/2 spherical component of a deformed configuration, consistent with experimental assignments. Complementary calculations for the triaxially deformed nucleus 145Tm and the weakly deformed nucleus 151Lu further confirm that the CQPC framework provides a unified and reliable description of proton emission across a wide deformation range. The results highlight the importance of coherent single-particle-collective coupling in shaping proton decay from deformed nuclei beyond the drip line and provide a fresh perspective on the interpretation of decays traditionally assigned to deformed Nilsson orbitals.",

keywords = "Angular-momentum conserved, Core-quasiparticle coupling model, Spectroscopic factor",

author = "Yeruoxi Chen and Chen, \{Q. B.\} and C. Qi",

note = "Publisher Copyright: {\textcopyright} 2025 The Authors.",

year = "2026",

month = jan,

doi = "10.1016/j.physletb.2025.140106",

language = "英语",

volume = "872",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Angular-momentum conserved description of the proton decay from highly deformed 131Eu

AU - Chen, Yeruoxi

AU - Chen, Q. B.

AU - Qi, C.

PY - 2026/1

Y1 - 2026/1

N2 - We investigate proton emission from the highly deformed nucleus 131Eu within the angular-momentum-conserving core-quasiparticle coupling (CQPC) model. The calculations reproduce well the observed energy spectra and decay properties, and demonstrate that the dominant emitting configuration originates from the d 3/2 spherical component of a deformed configuration, consistent with experimental assignments. Complementary calculations for the triaxially deformed nucleus 145Tm and the weakly deformed nucleus 151Lu further confirm that the CQPC framework provides a unified and reliable description of proton emission across a wide deformation range. The results highlight the importance of coherent single-particle-collective coupling in shaping proton decay from deformed nuclei beyond the drip line and provide a fresh perspective on the interpretation of decays traditionally assigned to deformed Nilsson orbitals.

AB - We investigate proton emission from the highly deformed nucleus 131Eu within the angular-momentum-conserving core-quasiparticle coupling (CQPC) model. The calculations reproduce well the observed energy spectra and decay properties, and demonstrate that the dominant emitting configuration originates from the d 3/2 spherical component of a deformed configuration, consistent with experimental assignments. Complementary calculations for the triaxially deformed nucleus 145Tm and the weakly deformed nucleus 151Lu further confirm that the CQPC framework provides a unified and reliable description of proton emission across a wide deformation range. The results highlight the importance of coherent single-particle-collective coupling in shaping proton decay from deformed nuclei beyond the drip line and provide a fresh perspective on the interpretation of decays traditionally assigned to deformed Nilsson orbitals.

KW - Angular-momentum conserved

KW - Core-quasiparticle coupling model

KW - Spectroscopic factor

UR - https://www.scopus.com/pages/publications/105025365993

U2 - 10.1016/j.physletb.2025.140106

DO - 10.1016/j.physletb.2025.140106

M3 - 文章

AN - SCOPUS:105025365993

SN - 0370-2693

VL - 872

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

M1 - 140106

ER -

Angular-momentum conserved description of the proton decay from highly deformed ¹³¹Eu

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Keywords

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