首页|Spectroscopic factors of resonance states with the Gamow shell model

Spectroscopic factors of resonance states with the Gamow shell model

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We provide an investigation of the spectroscopic factor of resonance states in A=5-8 nuclei,utilizing the Gamow shell model(GSM).Within the GSM,the configuration mixing is taken into account exactly with the shell model framework,and the con-tinuum coupling is addressed via the complex-energy Berggren ensemble,which treats bound,resonance,and non-resonant continuum single-particle states on an equal footing.As a result,both the configuration mixing and continuum coupling are meticulously considered in the GSM.We first calculate the low-lying states of helium isotopes and isotones with the GSM,and the results are compared with that of ab initio no-core shell model(NCSM)calculations.The results indicate that GSM can reproduce the low-lying resonance states more accurately than the NCSM.Following this,we delve into the spectroscopic factors of the resonance states as computed through both GSM and NCSM,concurrently conducting systematic calculations of overlap functions pertinent to these resonance states.Finally,the calculated overlap function and spectroscopic factor of 6He(01+)⊗vp3/2 → 7He(3/21-)with GSM are compared with the results from ab initio NCSM,variational Monte Carlo,and Green's func-tion Monte Carlo calculations,as well as available experimental data.The results assert that wave function asymptotes can only be reproduced in GSM,where resonance and continuum coupling are precisely addressed.

spectroscopic factoroverlap functionresonance statescontinuum couplingisospin symmetry breaking

Mengran Xie、Jianguo Li、Nicolas Michel、Honghui Li、Wei Zuo

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CAS Key Laboratory of High Precision Nuclear Spectroscopy,Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China

School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Beijing 100049,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaGansu Natural Science FoundationStrategic Priority Research Program of Chinese Academy of SciencesKey Research Programof the Chinese Academy of SciencesState Key Laboratory of Nuclear Physics and Technology,Peking University

12205340121752811197528222JR5RA123XDB34000000XDPB15NPT2020KFY13

2024

10.1007/s11433-023-2227-5

中国科学:物理学 力学 天文学(英文版)
中国科学院

中国科学:物理学 力学 天文学(英文版)

CSTPCD
影响因子：0.91
ISSN：1674-7348
年,卷(期)：2024.67(1)
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