New effective interaction for pf-shell nuclei and its implications for the stability of the N=Z=28 closed core

M. Honma, T. Otsuka, B. A. Brown, and T. Mizusaki
Phys. Rev. C 69, 034335 – Published 29 March 2004

Abstract

The effective interaction GXPF1 for shell-model calculations in the full pf shell is tested in detail from various viewpoints such as binding energies, electromagnetic moments and transitions, and excitation spectra. The semimagic structure is successfully described for N or Z=28 nuclei, Mn53, Fe54, Co55, and Ni56,57,58,59, suggesting the existence of significant core excitations in low-lying nonyrast states as well as in high spin yrast states. The results of N=Z odd-odd nuclei, Co54 and Cu58, also confirm the reliability of GXPF1 interaction in the isospin dependent properties. Studies of shape coexistence suggest an advantage of Monte Carlo shell model over conventional calculations in cases where full-space calculations still remain too large to be practical.

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  • Received 20 November 2003

DOI:https://doi.org/10.1103/PhysRevC.69.034335

©2004 American Physical Society

Authors & Affiliations

M. Honma1, T. Otsuka2,3, B. A. Brown4, and T. Mizusaki5

  • 1Center for Mathematical Sciences, University of Aizu, Tsuruga, Ikki-machi, Aizu-Wakamatsu, Fukushima 965-8580, Japan
  • 2Department of Physics and Center for Nuclear Study, University of Tokyo, Hongo, Tokyo 113-0033, Japan
  • 3RIKEN, Hirosawa, Wako-shi, Saitama 351-0198, Japan
  • 4National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824-1321, USA
  • 5Institute of Natural Sciences, Senshu University, Higashimita, Tama, Kawasaki, Kanagawa 214-8580, Japan

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Vol. 69, Iss. 3 — March 2004

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