Phys.Rev. C 102, 034302 (2020)

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

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

NUCLEAR STRUCTURE ^{49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72}Ca; calculated binding energies, S(n), S(2n), neutron effective single-particle energies (ESPE), energies of the first 2+ states in even-A nuclei. ^{51,52,53,54,55,56,57,58}Ca; calculated levels, J, π. ^51,53,55,57Ca; calculated energies and widths of the first 5/2+ and 9/2+ resonance states. Realistic Gamow shell model based on high-precision CD-Bonn potential. Comparison with experimental data. ⁵⁷Ca; predicted as the heaviest odd-A bound Ca isotope. ⁷⁰Ca; predicted as the dripline nucleus. Calculations support shell closures at ⁵²Ca, ⁵⁴Ca, and possibly at ⁷⁰Ca, and a weakening of shell closure at ⁶⁰Ca.

doi: 10.1103/PhysRevC.102.034302