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Phys. Rev. C 75, 064309 (2007) [30 pages]

Rotational damping, ridges, and the quasicontinuum of γ rays in 152Dy

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T. Lauritsen, R. V. F. Janssens, T. L. Khoo, I. Ahmad, M. P. Carpenter, F. G. Kondev, C. J. Lister, E. F. Moore, D. Seweryniak, and S. Zhu
Argonne National Laboratory, Argonne, Illinois 60439, USA

T. Døssing and B. Herskind
Niels Bohr Institute, DK-2100, Copenhagen, Denmark

A. Korichi and A. Lopez-Martens
C.S.N.S.M, IN2P3-CNRS, bat 104-108, F-91405 Orsay Campus, France

R. M. Clark, P. Fallon, G. Lane, A. O. Macchiavelli, and D. Ward
Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

A. M. Heinz
A. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520, USA

D. G. Jenkins
Department of Physics, University of York, Heslington, York YO10 5DD, United Kingdom

A. J. Larabee, B. Meredith, and J. Kozemczak
Greenville College, Greenville, Illinois 62246, USA

P. Chowdhury
University of Massachusetts, Lowell, Massachusetts 01854, USA

Received 17 November 2006; published 15 June 2007

The quasicontinuum of γ rays from the feeding and decay of superdeformed and normal bands in 152Dy have been extracted in one- and two-dimensional spectra. The Eγ-Eγ correlations in the latter reveal strong ridges associated with superdeformed and normal states in this nucleus. The entry distributions for normal and superdeformed bands have been extracted from measured fold and sum-energy distributions. A Monte Carlo model was developed to simultaneously describe all the quasicontinuum and ridge spectra as well as the feeding intensity of the superdeformed bands. The rotational damping widths in the normal and superdeformed wells were derived based on a comparison of the data with model calculations of the continuum of γ rays at finite temperature.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.75.064309
DOI:
10.1103/PhysRevC.75.064309
PACS:
23.20.Lv, 23.20.En, 27.70.+q, 27.80.+w