Observation of excited states in the neutron-rich nucleus Br89

B. M. Nyakó, J. Timár, M. Csatlós, Zs. Dombrádi, A. J. Krasznahorkay, I. Kuti, D. Sohler, T. G. Tornyi, M. Czerwiński, T. Rząca-Urban, W. Urban, L. Atanasova, D. L. Balabanski, K. Sieja, A. Blanc, G. de France, M. Jentschel, U. Köster, P. Mutti, G. S. Simpson, T. Soldner, and C. A. Ur
Phys. Rev. C 104, 054305 – Published 9 November 2021

Abstract

Excited states of the neutron-rich Br89 have been observed for the first time. They were populated in cold-neutron induced fission of U235 at the PF1B facility of the Institut Laue-Langevin, Grenoble. The measurement of γ radiation following fission has been performed using the EXILL array of Ge detectors. The observed level structure looks similar to the yrast level structure of Br87. Large valence space shell model calculations performed for Br89 confirmed this similarity. Comparison of the observed πg9/2 band with the results of the shell model calculations provides information on the evolution of collectivity in this region.

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  • Received 21 June 2021
  • Accepted 21 October 2021

DOI:https://doi.org/10.1103/PhysRevC.104.054305

©2021 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

B. M. Nyakó1, J. Timár1,*, M. Csatlós1, Zs. Dombrádi1, A. J. Krasznahorkay1, I. Kuti1, D. Sohler1, T. G. Tornyi1, M. Czerwiński2, T. Rząca-Urban2, W. Urban2, L. Atanasova3, D. L. Balabanski4, K. Sieja5, A. Blanc6, G. de France7, M. Jentschel6, U. Köster6, P. Mutti6, G. S. Simpson8, T. Soldner6, and C. A. Ur4

  • 1Institute for Nuclear Research (ATOMKI), Pf. 51, 4001 Debrecen, Hungary
  • 2Faculty of Physics, University of Warsaw, ul. Pasteura 5, PL-02-093 Warsaw, Poland
  • 3Department of Medical Physics and Biophysics, Medical University - Sofia, 1431 Sofia, Bulgaria
  • 4ELI-NP, Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering IFIN-HH, 077125 Bucharest-Magurele, Romania
  • 5Université de Strasbourg, IPHC, Strasbourg, France and CNRS, UMR7178, 67037 Strasbourg, France
  • 6Institut Laue-Langevin, 71 avenue des Martyrs, 38042 Grenoble Cedex 9, France
  • 7GANIL, CEA/DSM-CNRS/IN2P3, Bd Henri Becquerel, BP 55027, F-14076 Caen Cedex 5, France
  • 8LPSC, Université Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex, France

  • *Corresponding author: timar@atomki.hu

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Vol. 104, Iss. 5 — November 2021

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