The roles of three-nucleon force and continuum coupling in mirror symmetry breaking of oxygen mass region

S. Zhang; Y.Z. Ma; J.G. Li; B.S. Hu; Q. Yuan; Z.H. Cheng; F.R. Xu

Physics Letters B (Apr 2022)

The roles of three-nucleon force and continuum coupling in mirror symmetry breaking of oxygen mass region

S. Zhang,
Y.Z. Ma,
J.G. Li,
B.S. Hu,
Q. Yuan,
Z.H. Cheng,
F.R. Xu

Affiliations

S. Zhang: School of Physics, and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
Y.Z. Ma: School of Physics, and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
J.G. Li: School of Physics, and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
B.S. Hu: School of Physics, and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
Q. Yuan: School of Physics, and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
Z.H. Cheng: School of Physics, and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
F.R. Xu: Corresponding author.; School of Physics, and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China

Journal volume & issue: Vol. 827
p. 136958

Abstract

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With both three-nucleon force and continuum coupling included, we have developed a self-consistent ab initio Gamow shell model within the Gamow Hartree-Fock (GHF) basis obtained by the realistic interaction itself. With the chiral two-nucleon N3LO and three-nucleon N2LO interactions, the Gamow shell model has been applied to the mirror systems of Z=8 neutron-rich isotopes and N=8 proton-rich isotones, giving good agreements with data in binding energies, dripline positions and excitation spectra. The GHF calculated that the 0d3/2, 1s1/2 and 1p3/2 orbitals are resonances. The resonance states and their interplay with nonresonant continua play a crucial role in the descriptions of nuclei around driplines. Excitation spectra and Thomas-Ehrman shifts observed can be better described when both three-nucleon force and continuum coupling are considered in calculations. The three-nucleon force and continuum coupling produce a combined effect on the Thomas-Ehrman shift, e.g., for the 1/2+ resonance level of 19Na. The calculations help the understandings of related nuclear astrophysical processes.

Published in Physics Letters B

ISSN: 0370-2693 (Print); 1873-2445 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/physics-letters-b/

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