Level structure of the neutron-rich Cr56,58,60 isotopes: Single-particle and collective aspects

S. Zhu, A. N. Deacon, S. J. Freeman, R. V. F. Janssens, B. Fornal, M. Honma, F. R. Xu, R. Broda, I. R. Calderin, M. P. Carpenter, P. Chowdhury, F. G. Kondev, W. Królas, T. Lauritsen, S. N. Liddick, C. J. Lister, P. F. Mantica, T. Pawłat, D. Seweryniak, J. F. Smith, S. L. Tabor, B. E. Tomlin, B. J. Varley, and J. Wrzesiński
Phys. Rev. C 74, 064315 – Published 26 December 2006

Abstract

The structure of the Cr56,58,60 nuclei was investigated at Gammasphere using both deep inelastic and fusion-evaporation reactions. As a result of this work, expanded level schemes are now available for these three neutron-rich, even-even isotopes. Experimental signatures were found for both single-particle and collective excitations whose relative importance varies with neutron number. Together with recent structural information on the odd-A Cr55,57,59 neighbors, the present data highlight the changing role of the g9/2 orbital with neutron number. Comparisons with shell-model calculations using the recently developed GXPF1A interaction and with total Routhian surface calculations are presented.

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  • Received 6 September 2006

DOI:https://doi.org/10.1103/PhysRevC.74.064315

©2006 American Physical Society

Authors & Affiliations

S. Zhu1, A. N. Deacon2, S. J. Freeman2, R. V. F. Janssens1, B. Fornal3, M. Honma4, F. R. Xu5, R. Broda3, I. R. Calderin6, M. P. Carpenter1, P. Chowdhury7, F. G. Kondev8, W. Królas3, T. Lauritsen1, S. N. Liddick9,10, C. J. Lister1, P. F. Mantica9,10, T. Pawłat3, D. Seweryniak1, J. F. Smith2, S. L. Tabor6, B. E. Tomlin9,10, B. J. Varley2, and J. Wrzesiński3

  • 1Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
  • 2School of Physics and Astronomy, Schuster Laboratory, University of Manchester, Manchester M13 9PL, United Kingdom
  • 3Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342 Cracow, Poland
  • 4Center for Mathematical Sciences, University of Aizu, Tsuruga, Ikki-machi, Aizu-Wakamatsu, Fukushima 965-8580, Japan
  • 5Department of Technical Physics, Peking University, Beijing 100871, China
  • 6Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
  • 7University of Massachusetts, Lowell, Massachusetts 01854, USA
  • 8Nuclear Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
  • 9National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
  • 10Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA

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Vol. 74, Iss. 6 — December 2006

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