High-spin μs isomer in Zr98

G. S. Simpson, J. A. Pinston, D. Balabanski, J. Genevey, G. Georgiev, J. Jolie, D. S. Judson, R. Orlandi, A. Scherillo, I. Tsekhanovich, W. Urban, and N. Warr
Phys. Rev. C 74, 064308 – Published 12 December 2006

Abstract

A high-spin isomer in Zr98, of half-life 1.9 (2) μs, has been observed using the Lohengrin mass spectrometer of the high-flux reactor of the Institut Laue-Langevin, Grenoble. The isomer was produced by the thermal-neutron induced fission of Pu239. Measurements at the spectrometer focal point of γt and γγt, relative to the arrival of a fission fragment, allowed the isomer to be identified and the level scheme constructed. The isomeric state at 6603.3 keV of excitation energy is tentatively assigned a spin and parity of (17) and is proposed to have a π(g9/22)ν(g7/21h11/21) configuration.

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  • Received 23 June 2006

DOI:https://doi.org/10.1103/PhysRevC.74.064308

©2006 American Physical Society

Authors & Affiliations

G. S. Simpson1,2,*, J. A. Pinston2, D. Balabanski3, J. Genevey2, G. Georgiev4, J. Jolie5, D. S. Judson6, R. Orlandi1,7, A. Scherillo1,8, I. Tsekhanovich1, W. Urban9, and N. Warr10

  • 1Institut Laue-Langevin, B.P. 156, F-38042 Grenoble Cedex 9, France
  • 2Laboratoire de Physique Subatomique et de Cosmologie, IN2P3-Centre National de la Recherche Scientifique/Universite Joseph Fourier, F-38026 Grenoble Cedex, France
  • 3Dipartimento di Matematica e Fisica, Università di Camerino, via Madonna delle Carceri, I-62032 Camerino, Italy
  • 4Centre de Spectométrie Nucléaire et de Spectrométrie de Masse, F-91405 Orsay, France
  • 5Institut für Kernphysik, Universität zu Köln, Zülpicherstr. 77, D-50937 Köln, Germany
  • 6School of Engineering, University of Brighton, Brighton BN2 4GJ, United Kingdom
  • 7Department of Physics and Astronomy, The University of Manchester, Brunswick Street, Manchester M13 9PL, United Kingdom
  • 8Institut für Kernphysik, Universität zu Köln, Zülpicherstr. 77, D-50937 Köln, Germany
  • 9Faculty of Physics, Warsaw University, ul.Hoża 69, PL-00-681 Warszawa, Poland
  • 10Institut für Kernphysik, Universität zu Köln, Zülpicherstr. 77, D-50937 Köln, Germany

  • *Electronic address: simpson@lpsc.in2p3.fr

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Vol. 74, Iss. 6 — December 2006

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