Gamow-Teller decay of the T=1 nucleus Cr46

T. K. Onishi, A. Gelberg, H. Sakurai, K. Yoneda, N. Aoi, N. Imai, H. Baba, P. von Brentano, N. Fukuda, Y. Ichikawa, M. Ishihara, H. Iwasaki, D. Kameda, T. Kishida, A. F. Lisetskiy, H. J. Ong, M. Osada, T. Otsuka, M. K. Suzuki, K. Ue, Y. Utsuno, and H. Watanabe
Phys. Rev. C 72, 024308 – Published 16 August 2005

Abstract

The Gamow-Teller β decay of Cr46 to the N=Z odd-odd nucleus V46 has been observed for the first time. Cr46 was produced by the fragmentation of a Cr50 primary beam at 80 MeV/nucleon. By means of βγ coincidence measurements, a γ-ray peak at 993 keV corresponding to the decay of the 11+ state in V46 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 Cr46 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.

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  • Received 23 March 2005

DOI:https://doi.org/10.1103/PhysRevC.72.024308

©2005 American Physical Society

Authors & Affiliations

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

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Issue

Vol. 72, Iss. 2 — August 2005

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