Volume 47, Number 5, September I 1999
|Page(s)||552 - 555|
|Published online||01 September 2002|
Prefission neutron multiplicities and the fission modes of
IReS, UMR7500, IN2P3-CNRS/Université Louis Pasteur BP28, F-67037 Strasbourg Cedex 2, France
2 Vinca Institute of Nuclear Sciences - P.O. Box 522, 11001 Belgrade, Yugoslavia
3 Flerov Laboratory of Nuclear Reactions, JINR, Dubna - Moscow region, Russia
4 Université Libre de Bruxelles, PNTPM, CP 229 - Avenue F. D. Roosevelt, B1050, Bruxelles, Belgium
5 ISN, IN2P3-CNRS/Université Joseph Fourier 53 Avenue des Martyrs, F-38026, Grenoble Cedex, France
Accepted: 5 July 1999
The neutron spectra associated to the two fission modes of 226Th have been measured in coincidence with the fragment yields of the 18O + 208Pb reaction at . The pre- and post-fission multiplicities and temperatures have been extracted. Surprisingly, the prefission neutron multiplicities associated with the asymmetric mode are larger than those associated with the symmetric mode.
PACS: 24.75.+i – General properties of fission / 25.70.Jj – Fusion and fusion-fission reactions
© EDP Sciences, 1999
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