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Analysis of fusion-fission dynamics by pre-scission neutron emission in Ni-58 + Pb-208


Aritomo, Y. (Dubna, JINR) ; Ohta, M. (Konan U.) ; Materna, T. (Brussels U.) ; Hanappe, F. (Brussels U.) ; Dorvaux, O. (Strasbourg, IReS) ; Stuttge, L. (Strasbourg, IReS)

Published in: Nucl.Phys.
Year: 2005
Vol.: A759
Page No: 309-326
Pages: 18

Abstract: We analyzed the experimental data of the pre-scission neutron multiplicity in connection with fission fragments in the reaction $^{58}$Ni+$^{208}$Pb at the incident energy corresponding to the excitation energy of compound nucleus $E^{*}$=185.9 MeV, which was performed by D\'{e}MoN group. The relation between the pre-scission neutron multiplicity and each reaction process having different reaction time is investigated. In order to study the fusion-fission process accompanied by neutron emission, the fluctuation-dissipation model combined with a statistical model is employed. It is found that the fusion-fission process and the quasi-fission process are clearly distinguished in correlation with the pre-scission neutron multiplicity.

Keyword(s): Superheavy elements ; Fluctuation-dissipation dynamics ; Fusion-fission process ; Quasi-fission process ; Pre-scission neutron multiplicity

Web-Page: http://dx.doi.org/10.1016/j.nuclphysa.2005.05.155

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