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Phys. Rev. C 61, 044612 (2000) [11 pages]

Nuclear viscosity of hot rotating 240Cf

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N. P. Shaw1, I. Diószegi1, I. Mazumdar1, A. Buda1, C. R. Morton1, J. Velkovska1, J. R. Beene2, D. W. Stracener2, R. L. Varner2, M. Thoennessen3, and P. Paul4
1Department of Physics and Astronomy, State University of New York at Stony Brook, Stony Brook, New York 11794-3800
2Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
3National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824
4Brookhaven National Laboratory, Upton, New York 11973

Received 8 December 1999; published 21 March 2000

The absolute γ-ray/fission multiplicities from hot rotating 240Cf, populated at seven bombarding energies using the reaction 32S+208Pb, are reported. Statistical model calculations including nuclear dissipation have been performed to extract the dependence of the nuclear viscosity on temperature and/or nuclear deformation. The extracted nuclear dissipation coefficient is found to be independent of temperature. Large dissipation during the saddle to scission path provides a good fit to the γ-ray spectra.

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.61.044612
DOI:
10.1103/PhysRevC.61.044612
PACS:
25.70.Jj, 25.70.Gh, 24.30.Cz
 
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