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Phys. Rev. C 63, 044306 (2001) [6 pages]

Spherical-deformed shape coexistence for the pf shell in the nuclear shell model

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Takahiro Mizusaki1, Takaharu Otsuka2,3, Michio Honma4, and B. Alex Brown5
1Department of Law, Senshu University, Higashimita, Tama, Kawasaki, Kanagawa 214-8580, Japan
2Department of Physics, University of Tokyo, Hongo, Tokyo 113-0033, Japan
3RIKEN, Hirosawa, Wako-shi, Saitama 351-0198, Japan
4Center for Mathematical Sciences, University of Aizu, Tsuruga, Ikki-machi Aizu-Wakamatsu, Fukushima 965-8580, Japan
5National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824-1321

Received 19 October 2000; published 5 March 2001

A spherical-deformed shape coexistence for semimagic pf-shell nuclei is investigated. Deformed states can arise by breaking the f7/2 submagic shell, and coexist with spherical yrast states for 54Fe. These states are shown to be primarily two-particle two-hole excitations on top of the respective correlated ground states. In addition to these modes, a four-particle–four-hole excitation can be found for 54Fe, which is related to the deformed band of doubly magic 56Ni. To investigate this shape coexistence, we use the conventional shell-model diagonalization, constrained Hartree-Fock, generator coordinate, variation-after-projection, and Monte Carlo shell-model methods.


©2001 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevC.63.044306
DOI: 10.1103/PhysRevC.63.044306
PACS: 24.10.Cn, 21.60.Cs, 21.10.Re, 27.40.+z

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