One-body dissipation in agreement with prescission neutrons and fragment kinetic energies
Takahiro WadaLinear Accelerator Laboratory, The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-01, JapanYasuhisa AbeLinear Accelerator Laboratory, The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-01, JapanN. CârjanLinear Accelerator Laboratory, The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-01, Japan
1993en
ABI
Abstract
Fission dynamics of hot nuclei have been investigated using the two-dimensional Langevin equation. Including particle evaporation in the continuous limit, prescission multiplicities of neutrons, protons, and \ensuremath{\alpha} particles have been calculated. Both the calculated number of prescission neutrons and the average total kinetic energy of fission fragments are consistent with experimental values when one-body dissipation is assumed. Unusually strong hydrodynamical two-body viscosity also reproduces the experimental neutron multiplicity, but it significantly underestimates the average kinetic energy.
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