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Phys. Rev. C 70, 064304 (2004) [6 pages]

Development of shell closures at N=32,34 . II. Lowest yrast excitations in even-even Ti isotopes from deep-inelastic heavy-ion collisions

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B. Fornal1, S. Zhu2, R. V. F. Janssens2, M. Honma3, R. Broda1, P. F. Mantica4,5, B. A. Brown4,6, M. P. Carpenter2, P. J. Daly7, S. J. Freeman2,8, Z. W. Grabowski7, N. J. Hammond2, F. G. Kondev9, W. Królas1, T. Lauritsen2, S. N. Liddick4,5, C. J. Lister2, E. F. Moore2, T. Otsuka10, T. Pawłat1, D. Seweryniak2, B. E. Tomlin4,5, and J. Wrzesiński1
1Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342 Cracow, Poland
2Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
3Center for Mathematical Sciences, University of Aizu, Tsuruga, Ikki-machi, Aizu-Wakamatsu, Fukushima 965-8580, Japan
4National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
5Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
6Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
7Chemistry and Physics Departments, Purdue University, West Lafayette, Indiana 47907, USA
8Department of Physics and Astronomy, Schuster Laboratory, University of Manchester, Manchester M13 9PL, United Kingdom
9Nuclear Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
10Department of Physics, University of Tokyo, Hongo, Tokyo 113-0033, Japan and RIKEN, Hirosawa,Wako-shi, Saitama 351-0198, Japan

Received 28 July 2004; published 7 December 2004

Gamma rays from neutron-rich nuclei in the vicinity of Z=20 , N=28 have been studied at Gammasphere using deep-inelastic reactions induced by a 330-MeV 48Ca beam on a thick 238U target. The yrast γ -ray cascade of 56Ti was identified for the first time and the location in energy of the 2+ , 4+ , and 6+ states was determined. The low-spin 56Ti yrast structure does not support the presence of a subshell closure at N=34 as suggested on the basis of other data on nuclei in the region as well as shell model calculations with a recently proposed interaction.


©2004 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevC.70.064304
DOI: 10.1103/PhysRevC.70.064304
PACS: 21.60.Cs, 23.20.Lv, 27.80.+w, 25.70.Lm

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