Shell-model study of calcium isotopes toward their drip line

Coraggio, L.; De Gregorio, G.; Gargano, A.; Itaco, N.; Fukui, T.; Ma, Y. Z.; Xu, F. R.

doi:10.1103/physrevc.102.054326

Shell-model study of calcium isotopes toward their drip line

Journal Article · Mon Nov 23 00:00:00 EST 2020 · Physical Review. C

DOI:https://doi.org/10.1103/physrevc.102.054326· OSTI ID:1851239

^[1]; ^[2]; ^[3]; Itaco, N. ^[2]; Fukui, T. ^[4]; Ma, Y. Z. ^[5]; ^[5]

Camplesso Universitario di Monte S. Angelo, Napoli (Italy); OSTI
Camplesso Universitario di Monte S. Angelo, Napoli (Italy); Università degli Studi della Campania “Luigi Vanvitelli", Caserta (Italy)
Camplesso Universitario di Monte S. Angelo, Napoli (Italy)
Kyoto Univ. (Japan)
Peking Univ., Beijing (China)

Here, we report in this paper a study in terms of the nuclear shell model about the location of the calcium isotopes drip line. The starting point is considering the realistic two-body potential derived by Entem and Machleidt within chiral perturbation theory at next-to-next-to-next-to-leading order (N³LO), as well as a chiral three-body force at next-to-next-to-leading order (N²LO) whose structure and low-energy constants are consistent with the two-body potential. Then we construct the effective single-particle energies and residual interaction needed to diagonalize the shell-model Hamiltonian. The calculated two-neutron separation energies agree nicely with experiment until ⁵⁶Ca, which is the heaviest isotope whose mass has been measured, and do not show any sign of two-neutron emission until ⁷⁰Ca . We discuss the role of the choice of the model space in determining the neutron drip line, and also the dependence of the results on the parameters of the shell-model Hamiltonian.

View Accepted Manuscript (DOE)

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

Sponsoring Organization:: National Key R&D Program of China; National Natural Science Foundation of China; USDOE Office of Science (SC); Università degli Studi della Campania “Luigi Vanvitelli"

Grant/Contract Number:: SC0009971

OSTI ID:: 1851239

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 5 Vol. 102; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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