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Phys. Rev. C 67, 041303(R) (2003) [5 pages]

Transition quadrupole moments in the superdeformed band of 40Ca

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C. J. Chiara, E. Ideguchi*, M. Devlin†, D. R. LaFosse, F. Lerma‡, W. Reviol, S. K. Ryu, and D. G. Sarantites
Department of Chemistry, Washington University, St. Louis, Missouri 63130

C. Baktash and A. Galindo-Uribarri
Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6371

M. P. Carpenter, R. V. F. Janssens, T. Lauritsen, C. J. Lister, P. Reiter, and D. Seweryniak
Physics Division, Argonne National Laboratory, Argonne, Illinois 60439-4843

P. Fallon, A. Görgen§, and A. O. Macchiavelli
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720

D. Rudolph
Department of Physics, Lund University, S-22100 Lund, Sweden

Received 21 January 2003; published 28 April 2003

The transition quadrupole moments Qt for the superdeformed band in 40Ca have been determined through thin-target Doppler-shift attenuation analyses. A best-fit value of Qt=1.30±0.05 eb is obtained when a single value is assumed for the entire band. Fitting separate quadrupole moments for in-band transitions decaying from the high-spin states and the presumably admixed low-spin states results in Qt(high)=1.81-0.26+0.41 eb and Qt(low)=1.18-0.05+0.06 eb, respectively. Qt values extracted for individual transitions in a Doppler-broadened line-shape analysis also indicate smaller Qt values at lower spins. These results are consistent with the interpretation of this band as an eight-particle–eight-hole superdeformed band with a significant admixture of less-collective configurations at low spins.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.67.041303
DOI:
10.1103/PhysRevC.67.041303
PACS:
21.10.Ky, 21.10.Re, 23.20.Lv, 27.40.+z

*Present address: RIKEN, The Institute of Physical and Chemical Research, Saitama 351-0198, Japan.

†Present address: LANSCE-3, MS H855, Los Alamos National Laboratory, Los Alamos, NM 87545.

‡Present address: Radiation Oncology Center, Washington University, St. Louis, MO 63110.

§Present address: DAPNIA/SPhN, CEA-Saclay, F-91191 Gif-sur-Yvette Cedex, France.

 
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