New evidence for deformation in 73Zn

M. Huhta, P. F. Mantica, D. W. Anthony, P. A. Lofy, J. I. Prisciandaro, R. M. Ronningen, M. Steiner, and W. B. Walters
Phys. Rev. C 58, 3187 – Published 1 December 1998
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Abstract

The β decay of 73Cu to levels in 73Zn has been studied. The 73Cu nuclides were produced by fragmentation of 76Ge projectiles having energies of 70 MeV/nucleon in a 202mg/cm2 thick 9Be target. β and γ singles, β-γ and γ-γ coincidence data were collected and used to construct the low-energy level scheme of 73Zn. New spin-parity assignments have been deduced for some excited states in 73Zn based on measured β decay branching ratios and systematics of other N=43 isotones. A 195-keV transition was identified in 73Zn with a half-life of 13.0(2) ms, a value several orders of magnitude shorter than previously reported, and is consistent with an M2 multipolarity. The low-energy level structure of 73Zn is shown to be consistent with particle-triaxial rotor model calculations employing a ground state quadrupole deformation with β2=0.2.

  • Received 26 May 1998

DOI:https://doi.org/10.1103/PhysRevC.58.3187

©1998 American Physical Society

Authors & Affiliations

M. Huhta1, P. F. Mantica1,2, D. W. Anthony1,2, P. A. Lofy1,2, J. I. Prisciandaro1,2, R. M. Ronningen1, M. Steiner1, and W. B. Walters3

  • 1National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824
  • 2Department of Chemistry, Michigan State University, East Lansing, Michigan 48824
  • 3Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742

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Vol. 58, Iss. 6 — December 1998

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