2020/08/27 by J. G. Li, B. S. Hu, Q. Wu +6
Earth and Planetary Sciences · Physics and Astronomy · #Astronomical and nuclear sciences #Atomic physics #Excitation #High-pressure geophysics and materials #Isotope #Isotopes of calcium #Materials science #Neutron #Nuclear physics #Nuclear physics research studies #Physics #Quantum mechanics #SHELL model #Shell (structure) #nucl-th
paper · pdf · doi:10.1103/physrevc.102.034302
published as Phys. Rev. C 102, 034302 (2020) · 24 pages, 6 figures
arxiv created 2020/08/27 · openalex created_date 2020/09/01 · openalex publication_date 2020/09/01 · arxiv updated 2021/01/12 · openalex updated_date 2026/08/06
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 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 (N=32) and 54Ca (N=34) but show a weakening of shell closure at 60Ca (N=40). The possible shell closure at 70Ca (N=50) is predicted.