1. Dynamic and quasistatic trajectories in quasifission reactions and particle emission
- Author
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X. Viñas, M. Centelles, V. P. Aleshin, N. G. Nicolis, and Universitat de Barcelona
- Subjects
Thermal equilibrium ,Physics ,Nuclear and High Energy Physics ,Nuclear Theory ,Fission ,Phase (waves) ,Nuclear physics ,Nuclear fission ,Binary number ,FOS: Physical sciences ,Alpha particle ,Dissipation ,Partícules (Física nuclear) ,Fissió nuclear ,Nuclear Theory (nucl-th) ,Monte Carlo method ,Neutron ,Física nuclear ,Statistical physics ,Atomic physics ,Nuclear Experiment ,Mètode de Montecarlo ,Quasistatic process ,Física estadística ,Particles (Nuclear physics) - Abstract
We show that the quasifission paths predicted by the one-body dissipation dynamics, in the slowest phase of a binary reaction, follow a quasistatic path, which represents a sequence of states of thermal equilibrium at a fixed value of the deformation coordinate. This establishes the use of the statistical particle-evaporation model in the case of dynamical time-evolving systems. Pre- and post-scission multiplicities of neutrons and total multiplicities of protons and alpha particles in fission reactions of 63Cu+92Mo, 60Ni+100Mo, 63Cu+100Mo at 10 MeV/u and 20Ne+144,148,154Sm at 20 MeV/u are reproduced reasonably well with statistical model calculations performed along dynamic trajectories whose slow stage (from the most compact configuration up to the point where the neck starts to develop) lasts some 35x10^{-21} s., Comment: 29 pages, 9 figures
- Published
- 2001