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Phys. Rev. C 71, 041302 (2005) [4 pages]

Reduced transition probabilities to the first 2+ state in 52,54,56Ti and development of shell closures at N=32,34

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D.-C. Dinca1,2, R. V. F. Janssens3, A. Gade2, D. Bazin2, R. Broda4, B. A. Brown1,2, C. M. Campbell1,2, M. P. Carpenter3, P. Chowdhury3,5, J. M. Cook1,2, A. N. Deacon6, B. Fornal4, S. J. Freeman6, T. Glasmacher1,2, M. Honma7, F. G. Kondev8, J.-L. Lecouey2, S. N. Liddick2,9, P. F. Mantica2,9, W. F. Mueller2, H. Olliver1,2, T. Otsuka10, J. R. Terry1,2, B. A. Tomlin2,9, and K. Yoneda2
1Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824
2National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824
3Physics Division, Argonne National Laboratory, Argonne, Illinois 60439
4Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342 Cracow, Poland
5University of Massachusetts Lowell, Lowell, Massachusetts 01854
6Department of Physics and Astronomy, Schuster Laboratory, University of Manchester, Manchester M13 9PL, United Kingdom
7Center for Mathematical Sciences, University of Aizu, Tsuruga, Ikki-machi, Aizu-Wakamatsu, Fukushima 965-8580, Japan
8Nuclear Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439
9Department of Chemistry, Michigan State University, East Lansing, Michigan 48824
10Department of Physics and Center for Nuclear Study, University of Tokyo, Hongo, Tokyo 113-0033, Japan and RIKEN, Hirosawa, Wako-shi, Saitama 351-0198, Japan

Rapid Communication Received 8 November 2004; published 15 April 2005

The even 52-56Ti isotopes have been studied with intermediate-energy Coulomb excitation and absolute B(E2;0+→21+) transition rates have been obtained. These data confirm the presence of a subshell closure at neutron number N=32 in neutron-rich nuclei above the doubly magic nucleus 48Ca and provide no direct evidence for the predicted N=34 closure. Large-scale shell model calculations with the most recent effective interactions are unable to reproduce the magnitude of the measured strengths in the semimagic Ti nuclei and their strong variation with neutron number.


©2005 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevC.71.041302
DOI: 10.1103/PhysRevC.71.041302
PACS: 23.20.Js, 21.60.Cs, 25.70.De, 27.40.+z

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