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Phys. Rev. C 72, 024308 (2005) [7 pages]

Gamow-Teller decay of the T=1 nucleus 46Cr

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T. K. Onishi1, A. Gelberg2,3, H. Sakurai1, K. Yoneda3, N. Aoi3, N. Imai1, H. Baba4, P. von Brentano2, N. Fukuda3, Y. Ichikawa1, M. Ishihara3, H. Iwasaki1, D. Kameda5, T. Kishida3, A. F. Lisetskiy6, H. J. Ong1, M. Osada1, T. Otsuka1, M. K. Suzuki1, K. Ue1, Y. Utsuno7, and H. Watanabe3
1Department of Physics, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, 113-0033 Tokyo, Japan
2Institut für Kernphysik der Universität zu Köln, D-50937 Köln, Germany
3Institute of Physical and Chemical Research (RIKEN), Hirosawa 2-1, Wako-shi, 351-0198 Japan
4Department of Physics, Rikkyo University, Nishi-Ikebukuro 3-34-1, Toshima, Tokyo, Japan
5Department of Physics, Tokyo Institute of Technology, Ookayama 2-12-1, Meguro, Tokyo, Japan
6Michigan State University, Cyclotron, East Lansing, Michigan 48824, USA
7Japan Atomic Energy Research Institute, Tokai-mura, 319-1195 Japan

Received 23 March 2005; published 16 August 2005

The Gamow-Teller β decay of 46Cr to the N=Z odd-odd nucleus 46V has been observed for the first time. 46Cr was produced by the fragmentation of a 50Cr primary beam at 80 MeV/nucleon. By means of β-γ coincidence measurements, a γ-ray peak at 993 keV corresponding to the decay of the 11+ state in 46V was observed. The branching ratio of the Gamow-Teller decay to this state was found to be bGT=0.216±0.050. The half-life of 46Cr was measured to be T1/2=240±140 ms. The transition strength was determined to be B(GT)=0.64±0.20. This result was compared with theoretical values calculated with the shell model and the phenomenological quasideuteron model.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.72.024308
DOI:
10.1103/PhysRevC.72.024308
PACS:
23.60.+e, 23.40.Hc, 25.70.Mn
 
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