50 70 v 1 2 6 M ay 2 00 0 Dynamic and Quasistatic Trajectories in Quasifission Reactions and Particle Emission
نویسنده
چکیده
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. Preand post-scission multiplicities of neutrons and total multiplicities of protons and α particles in fission reactions of Cu+Mo, Ni+Mo, Cu+Mo at 10 MeV/u and Ne+Sm 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 35× 10 s. PACS numbers: 25.70.Gh, 24.75.+i, 25.70.Jj
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