Neutron-rich calcium isotopes within realistic Gamow shell model calculations with continuum coupling

Li, J. G.; Hu, B. S.; Wu, Q.; Gao, Y.; Dai, S. J.; Xu, F. R.

doi:10.1103/physrevc.102.034302

Title: Neutron-rich calcium isotopes within realistic Gamow shell model calculations with continuum coupling

Journal Article · Tue Sep 01 00:00:00 EDT 2020 · Physical Review C

DOI:https://doi.org/10.1103/physrevc.102.034302· OSTI ID:1801972

Li, J. G. ^[1];

^[1]; Wu, Q. ^[1]; Gao, Y. ^[1]; Dai, S. J. ^[1];

^[1]

Peking Univ., Beijing (China)

Based on the realistic nuclear force of the high-precision CD-Bonn potential, we have performed comprehensive calculations for neutron-rich calcium isotopes using the Gamow shell model (GSM) which includes resonance and continuum. The realistic GSM calculations produce well binding energies, one- and two-neutron separation energies, predicting that ⁵⁷Ca is the heaviest bound odd isotope and ⁷⁰Ca is the dripline nucleus. Resonant states are predicted, which provides useful information for future experiments on particle emissions in neutron-rich calcium isotopes. Shell evolutions in the calcium chain around neutron numbers $$\textit{N}$$ = 32, 34, and 40 are understood by calculating effective single-particle energies, the excitation energies of the first 2⁺ states and two-neutron separation energies. The calculations support shell closures at ⁵²Ca ($$\textit{N}$$ = 32) and ⁵⁴Ca ($$\textit{N}$$ = 34) but show a weakening of shell closure at ⁶⁰Ca ($$\textit{N}$$ = 40). Finally, the possible shell closure at ⁷⁰Ca ($$\textit{N}$$ = 50) is predicted.

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Research Organization:: Texas A & M Univ., Commerce, TX (United States)

Sponsoring Organization:: USDOE Office of Science (SC); National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC)

Grant/Contract Number:: SC0009971; 2018YFA0404401; 11835001; 11921006; NPT2020ZZ01

OSTI ID:: 1801972

Journal Information:: Physical Review C, Vol. 102, Issue 3; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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