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Phys. Rev. C 70, 057305 (2004) [4 pages]

Core excited states in the A=51 mirror nuclei

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J. Ekman, C. Andreoiu*, C. Fahlander, M. N. Mineva, and D. Rudolph
Department of Physics, Lund University, S-22100 Lund, Sweden

M. A. Bentley and S. J. Williams†
School of Chemistry and Physics, Keele University, Keele, Staffordshire, ST5 5BG, United Kingdom

R. J. Charity, E. Ideguchi‡, W. Reviol, D. G. Sarantites, and V. Tomov
Chemistry Department, Washington University, St. Louis, Missouri 63130, USA

R. M. Clark, M. Cromaz, P. Fallon, and A. O. Macchiavelli
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

M. P. Carpenter and D. Seweryniak
Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA

Received 9 August 2004; published 18 November 2004

Three previously unknown high-energy γ-ray transitions between 4.2 and 5.4 MeV were identified in the Tz=−1∕2 nucleus 51Fe following the fusion-evaporation reaction 32S(28Si,2α1n)51Fe. These transitions represent decays of core excited states. The γ rays were detected in the Ge detector array Gammasphere combined with the neutron detector system Neutron Shell and the charged-particle array Microball. The three transitions are related to the mirror transitions in the Tz=+1∕2 nucleus 51Mn, and the resulting mirror-energy difference diagram is discussed with predictions from large-scale shell-model calculations.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.70.057305
DOI:
10.1103/PhysRevC.70.057305
PACS:
21.60.Cs, 23.20.En, 23.20.Lv, 27.40.+z

*Present address: Department of Physics, University of Guelph, Guelph, Ontario, Canada N1G 2W1.

†Present address: School of Electronics and Physics, University of Surrey, Guildford, Surrey, GU2 7XH, U.K.

‡Present address: Center for Nuclear Study, University of Tokyo, Saitama 351-0198, Japan.

 
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