High-spin states in Nb92

B. A. Brown and D. B. Fossan
Phys. Rev. C 15, 2044 – Published 1 June 1977
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Abstract

High-spin states have been investigated with the Sr88(Li7,3n)Nb92 reaction by γγ coincidence, γ-ray angular distribution, and pulsed beam-γ timing measurements with Ge(Li) detectors. Decay schemes, level energies, and spin-parity information were obtained for Nb92 from the data. The positive-parity yrast level sequence was established up to a 13+ state at 3326 keV. An 11 isomeric level at 2203 keV was found and observed to have a mean lifetime of τ=241±5 nsec. The g factor of this isomer was measured to be g=0.88±0.03. The observed properties of levels in Nb92 are compared with shell-model calculations.

NUCLEAR REACTIONS Sr88(Li7,3n), ELi=34 MeV; measured γγ coin, γ(E,θ,t), spin rotation in B=11.2 kG; deduced level scheme in Nb92, γ multipolarities, T12,Jπ, g factor. Natural target, Ge(Li) detectors.

  • Received 23 February 1977

DOI:https://doi.org/10.1103/PhysRevC.15.2044

©1977 American Physical Society

Authors & Affiliations

B. A. Brown* and D. B. Fossan

  • Department of Physics, State University of New York, Stony Brook, New York 11794

  • *Present address: Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824.

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Vol. 15, Iss. 6 — June 1977

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