Nuclear dissipation from measurements light charged particle emission in fusion-fission reactions
At moderate excitation energies, the dynamics of nuclear fission are determined by the dissipative coupling of collective and internal single-particle degrees of freedom. One of the foremost problems in nuclear physics is understanding the mechanism and magnitude of this dissipation. The alpha particle and proton multiplicities from the reactions {sup 19}F+{sup 169}Tm, {sup 28}Si+{sup 160}Gd and {sup 34}S+{sup 154}Sm have been mea- sured. Pre- and post-saddle timescales for the fission of {sup 188} Pt were then extracted from these multiplicities using a statistical model modified to include fission delay times and a Kramers factor. The timescales have now been interpreted within the framework of a Langevin collective transport model to give values of the dissipation as a function of deformation. These results will be presented and comparisons made with different microscopic models of nuclear dissipation.
- OSTI ID:
- 255600
- Report Number(s):
- CONF-9510116-; ISSN 0003-0503; TRN: 96:015915
- Journal Information:
- Bulletin of the American Physical Society, Vol. 40, Issue 10; Conference: Fall meeting of the Division of Nuclear Physics of the American Physical Society, Bloomington, IN (United States), 25-28 Oct 1995; Other Information: PBD: Oct 1995
- Country of Publication:
- United States
- Language:
- English
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