Transition strengths in odd-odd 86Nb

M. Wiedeking, R. A. Kaye, G. Z. Solomon, S. L. Tabor, J. Döring, G. D. Johns, F. Cristancho, M. Devlin, F. Lerma, D. G. Sarantites, I. Y. Lee, and A. O. Macchiavelli
Phys. Rev. C 62, 024316 – Published 20 July 2000
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Abstract

High angular momentum states in odd-odd 86Nb were populated through the 58Ni(32S,3pn) reaction at 135 MeV. Recoiling 86Nb nuclei were stopped in a thick Ta backing. Prompt multi-γ coincidences with evaporated charged particles were detected using the full array of Gammasphere and the Microball. Mean lifetimes of 51 levels in 86Nb were measured using the Doppler-shift attenuation method. Strongly alternating magnetic dipole transition strengths were observed in the yrast positive-parity bands. Most of the transition quadrupole moments inferred from the lifetimes lie in the range of 1 to 2.7eb, which would correspond to quadrupole deformations β2 of 0.10 to 0.27 in a rotational model. Comparison with Hartree-Fock-Bogoliubov cranking calculations suggests triaxial to oblate shapes.

  • Received 20 January 2000

DOI:https://doi.org/10.1103/PhysRevC.62.024316

©2000 American Physical Society

Authors & Affiliations

M. Wiedeking1,2, R. A. Kaye1,*, G. Z. Solomon1, S. L. Tabor1, J. Döring3,†, G. D. Johns4, F. Cristancho5, M. Devlin6, F. Lerma6, D. G. Sarantites6, I. Y. Lee7, and A. O. Macchiavelli7

  • 1Department of Physics, Florida State University, Tallahassee, Florida 32306
  • 2Department of Physics, University of Surrey, Guildford, Surrey GU2 5XH, United Kingdom
  • 3Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556
  • 4Los Alamos National Laboratory, Los Alamos, New Mexico 87545
  • 5Departamento de Física, Universidad Nacional de Colombia, Bogotá, Colombia
  • 6Chemistry Department, Washington University, St. Louis, Missouri 63130
  • 7Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720

  • *Present address: Department of Physics and Chemistry, Purdue University Calumet, Hammond, Indiana 46323.
  • Present address: GSI, D-64291 Darmstadt, Germany.

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Vol. 62, Iss. 2 — August 2000

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