Phys. Rev. Lett.
95,
232501
(2005)
[5 pages]
Evidence for Nontermination of Rotational Bands in 74Kr
J. J. Valiente-Dobón et al.
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J. J. Valiente-Dobón1,*, T. Steinhardt2, C. E. Svensson1, A. V. Afanasjev3,4, I. Ragnarsson5, C. Andreoiu1,6, R. A. E. Austin7, M. P. Carpenter8, D. Dashdorj9, G. de Angelis10, F. Dönau11, J. Eberth2, E. Farnea12, S. J. Freeman8, A. Gadea10, P. E. Garrett1,13, A. Görgen14, G. F. Grinyer1, B. Hyland1, D. Jenkins15, F. Johnston-Theasby15, P. Joshi15, A. Jungclaus16, K. P. Lieb17, A. O. Macchiavelli18, E. F. Moore8, G. Mukherjee8, D. R. Napoli10, A. A. Phillips1, C. Plettner11, W. Reviol19, D. Sarantites19, H. Schnare11, M. A. Schumaker1, R. Schwengner11, D. Seweryniak8, M. B. Smith13, I. Stefanescu2, O. Thelen2, and R. Wadsworth15
1Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada
2Institut für Kernphysik, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany
3Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
4Department of Physics and Astronomy, Mississippi State University, Mississippi 39762, USA
5Lund Institute of Technology, P.O. Box 118 S-221 00 Lund, Sweden
6Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 3BX, United Kingdom
7McMaster University, Hamilton, Ontario L8S 4K1, Canada
8Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
9North Carolina State University, Raleigh, North Carolina 27695, USA
10Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, Legnaro, Italy
11Institut für Kern- und Hadronenphysik, FZ Rossendorf, D-01314 Dresden, Germany
12Dipartimento di Fisica, Universitá di Padova and INFN Sezione di Padova, Padova, Italy
13TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
14CEA Saclay, DAPNIA/SPhN, 91191 Gif-sur-Yvette Cedex, France
15Department of Physics, University of York, Heslington, York YO10 5DD, United Kingdom
16Departamento de Física Teórica, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
17II. Physikalisches Institut, Universität Göttingen, D-37073 Göttingen, Germany
18Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
19Department of Chemistry, Washington University, St. Louis, Missouri 63130, USA
Received 18 July 2005; published 28 November 2005
Three rotational bands in 74Kr were studied up to (in one case one transition short of) the maximum spin Imax of their respective single-particle configurations. Their lifetimes have been determined using the Doppler-shift attenuation method. The deduced transition quadrupole moments reveal a modest decrease, but far from a complete loss of collectivity at the maximum spin Imax. This feature, together with the results of mean field calculations, indicates that the observed bands do not terminate at I=Imax.
© 2005 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.232501
DOI:
10.1103/PhysRevLett.95.232501
PACS:
27.50.+e, 21.10.Re, 21.10.Tg, 21.60.Ev
*Electronic address: valiente@lnl.infn.it
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