β decay of neutron-rich Ca5356

P. F. Mantica, R. Broda, H. L. Crawford, A. Damaske, B. Fornal, A. A. Hecht, C. Hoffman, M. Horoi, N. Hoteling, R. V. F. Janssens, J. Pereira, J. S. Pinter, J. B. Stoker, S. L. Tabor, T. Sumikama, W. B. Walters, X. Wang, and S. Zhu
Phys. Rev. C 77, 014313 – Published 22 January 2008

Abstract

β-decay properties of neutron-rich Ca isotopes have been obtained. Half-life values were determined for the first time for Ca54 (86±7 ms), Ca55 (22±2 ms), and Ca56 (11±2 ms). The half-life of 230±60 ms deduced for Ca53 is significantly longer than reported previously, where the decay chain K53Ca53Sc53 was considered. A delayed γ ray with an energy of 247 keV was identified following β decay of Ca54 and is proposed to depopulate the 11+ level in Sc54. The β-decay properties compare favorably with the results of shell-model calculations completed in the full pf space with the GXPF1 interaction. The half-lives of the neutron-rich Ca isotopes are also compared with gross β-decay theory. The systematic trend of the neutron-rich Ca half-lives is consistent with the presence of a subshell gap at N=32.

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  • Received 29 November 2007

DOI:https://doi.org/10.1103/PhysRevC.77.014313

©2008 American Physical Society

Authors & Affiliations

P. F. Mantica1,2, R. Broda3, H. L. Crawford1,2, A. Damaske1,2, B. Fornal3, A. A. Hecht4,5, C. Hoffman6, M. Horoi7, N. Hoteling4,5, R. V. F. Janssens5, J. Pereira1,8, J. S. Pinter1,2, J. B. Stoker1,2, S. L. Tabor6, T. Sumikama9,*, W. B. Walters6, X. Wang5,10, and S. Zhu5

  • 1National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
  • 2Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
  • 3Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342, Cracow, Poland
  • 4Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA
  • 5Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
  • 6Department of Physics and Astronomy, Florida State University, Tallahassee, Florida 32306, USA
  • 7Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859, USA
  • 8Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
  • 9RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
  • 10Department of Physics, University of Notre Dame, South Bend, Indiana 46556, USA

  • *Present address: Department of Physics, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan.

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Vol. 77, Iss. 1 — January 2008

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