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Phys. Rev. C 79, 054320 (2009) [7 pages]

Low-energy structure of 61Mn populated following β decay of 61Cr

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H. L. Crawford1,2, P. F. Mantica1,2, J. S. Berryman1,2, R. Broda3, B. Fornal3, C. R. Hoffman4, N. Hoteling5,6, R. V. F. Janssens5, S. M. Lenzi7,8, J. Pereira2,9, J. B. Stoker1,2, S. L. Tabor4, W. B. Walters6, X. Wang5,10, and S. Zhu5
1Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
2National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
3Institute of Nuclear Physics, Polish Academy of Sciences, Cracow PL-31342, Poland
4Department of Physics and Astronomy, Florida State University, Tallahassee, Florida 32306, USA
5Physics Division, Argonne National Laboratory, Argonne, Illinois 60429, USA
6Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA
7Department of Physics, Padova University, I-35131 Padova, Italy
8National Institute of Nuclear Physics, Padova Section, I-35131 Padova, Italy
9Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
10Department of Physics, University of Notre Dame, South Bend, Indiana 46556, USA

Received 16 March 2009; published 15 May 2009

β decay of the 61Cr37 ground state has been studied. A new half-life of 233±11 ms has been deduced, and seven delayed γ rays have been assigned to the daughter 61Mn36. The low-energy level structure of 61Mn36 is similar to that of the less neutron-rich 57,59Mn nuclei. The odd-A25Mn isotopes follow the systematic trend in the yrast states of the even-even, Z+1 26Fe isotopes, and not that of the Z-1 24Cr isotopes, where a possible onset of collectivity has been suggested to occur already at N=36.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.79.054320
DOI:
10.1103/PhysRevC.79.054320
PACS:
23.40.-s, 21.10.Tg, 23.20.Lv, 27.50.+e