Realistic shell-model calculations for isotopic chains "north-east'' of 48Ca in the (N,Z) plane

Abstract

We perform realistic shell-model calculations for nuclei with valence nucleons outside 48Ca, employing two different model spaces. The matrix elements of the effective two-body interaction and electromagnetic multipole operators have been calculated within the framework of the many-body perturbation theory, starting from a low-momentum potential derived from the high-precision CD-Bonn free nucleon-nucleon potential. The role played by the neutron orbital 1d5/2 has been investigated by comparing experimental data on yrast quadrupole excitations of isotopic chains north-east of 48Ca with the results of calculations including or not including this single-particle state in the model space.

12 pages, 9 figures, 7 tables, to be published in Physical Review C

References in corpus (6)

• Evolution of shell structure in neutron-rich calcium isotopes
• Shell-model calculations and realistic effective interactions
• Observation of isotonic symmetry for enhanced quadrupole collectivity in neutron-rich 62,64,66Fe isotopes at N=40
• Shell model study of single-particle and collective structure in neutron-rich Cr isotopes
• Study of neutron-rich calcium isotopes with a realistic shell-model interaction
• Enhanced collectivity in 74Ni

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