T=0 and T=1 states in the odd-odd N=Z nucleus, 3570Br35

D. G. Jenkins, N. S. Kelsall, C. J. Lister, D. P. Balamuth, M. P. Carpenter, T. A. Sienko, S. M. Fischer, R. M. Clark, P. Fallon, A. Görgen, A. O. Macchiavelli, C. E. Svensson, R. Wadsworth, W. Reviol, D. G. Sarantites, G. C. Ball, J. Rikovska Stone, O. Juillet, P. Van Isacker, A. V. Afanasjev, and S. Frauendorf
Phys. Rev. C 65, 064307 – Published 28 May 2002
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Abstract

Excited states in 70Br were populated in the 40Ca(32S,pn) reaction at Ebeam=80100MeV and the 40Ca(36Ar,αpn) reaction at Ebeam=145MeV. The resulting gamma decay was detected using the Gammasphere array triggered by a 30-element neutron detector. The cross-bombardment allowed the unambiguous assignment of levels to 70Br, comprising a total of 32 states built both on the Jπ=0+ ground state and a previously known Jπ=9+ isomer, which is located at an excitation energy of 2293 keV by the observation of linking transitions. The structures are discussed within the context of the two-quasiparticle plus rotor model, the IBM-4 model and the cranked Nilsson-Strutinsky formalism. The nonobservation of a doublet of J=0, T=1 and J=1, T=0 states at low excitation in 70Br is indicative that T=0 proton-neutron pairing strength is weak in comparison to T=1 pairing.

  • Received 18 January 2002

DOI:https://doi.org/10.1103/PhysRevC.65.064307

©2002 American Physical Society

Authors & Affiliations

D. G. Jenkins1,2,*, N. S. Kelsall3, C. J. Lister2, D. P. Balamuth1, M. P. Carpenter2, T. A. Sienko2, S. M. Fischer4, R. M. Clark5, P. Fallon5, A. Görgen5, A. O. Macchiavelli5, C. E. Svensson5, R. Wadsworth3, W. Reviol6, D. G. Sarantites6, G. C. Ball7, J. Rikovska Stone8,9, O. Juillet10, P. Van Isacker10, A. V. Afanasjev2,11,12, and S. Frauendorf11,13

  • 1Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104
  • 2Physics Division, Argonne National Laboratory, Argonne, Illinois 60439
  • 3Department of Physics, University of York, Heslington, York YO1 5DD, United Kingdom
  • 4Department of Physics, DePaul University, Chicago, Illinois 60614
  • 5Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
  • 6Department of Chemistry, Washington University, St. Louis, Missouri 63130
  • 7TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2A3
  • 8Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
  • 9Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742
  • 10Grand Accélérateur National d’Ions Lourds, Boîte Postale 55027, F-14076 Caen Cedex 5, France
  • 11Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556
  • 12Laboratory of Radiation Physics, Institute of Solid State Physics, University of Latvia, LV 2169 Salaspils, Miera str. 31, Latvia
  • 13IKH, Rossendorf Research Centre, PB 51 01 19, D-01314 Dresden, Germany

  • *Present address: Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 3BX, United Kingdom.

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Vol. 65, Iss. 6 — June 2002

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