Systematics of first ${2}^{+}$ state $g$ factors around mass 80

Systematics of first $2^{+}$ state $g$ factors around mass 80

T. J. Mertzimekis, A. E. Stuchbery, N. Benczer-Koller, and M. J. Taylor

Phys. Rev. C 68, 054304 – Published 11 November 2003

Abstract

The systematics of the first $2^{+}$ state $g$ factors in the mass 80 region are investigated in terms of an IBM-II analysis, a pairing-corrected geometrical model, and a shell-model approach. Subshell closure effects at $N = 38$ and overall trends were examined using IBM-II. A large-space shell-model calculation was successful in describing the behavior for $N = 48$ and $N = 50$ nuclei, where single-particle features are prominent. A schematic truncated-space calculation was applied to the lighter isotopes. The variations of the effective boson $g$ factors are discussed in connection with the role of $F$ -spin breaking, and comparisons are made between the mass 80 and mass 180 regions.

Received 8 May 2003

DOI:https://doi.org/10.1103/PhysRevC.68.054304

Authors & Affiliations

T. J. Mertzimekis and A. E. Stuchbery^*

National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA

N. Benczer-Koller and M. J. Taylor^†

Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903, USA

^*Permanent address: Department of Nuclear Physics, Australian National University, Canberra ACT 0200, Australia.
^†Present address: School of Engineering, University of Brighton, Brighton BN2 4GJ, UK

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Vol. 68, Iss. 5 — November 2003

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Physical Review C

covering nuclear physics