Characteristics of Fragments Produced by Ternary Fission in Intermediate Energy

Abstract

The characteristics of fragments produced in the ternary fissions have been researched by using the improved quantum molecular dynamics model in heavy 197Au+197Au at 15 MeV/nucleon. The physical quantities of Z, n/z, θ, ptrans/plong about the nuclear fragments have strong dependencies on the impact parameters, and their curves are systematically drawn. By the study of these theoretical results above, we have concluded that there is a cut-off point at b =6 fm, which divides the impact parameters into two regions: the central or semi-peripheral and peripheral regions, and the ternary breakup mechanisms should be very different at these two impact parameter regions. Further research has showed that the regional property of n/z is related to the isospin symmetry of nuclear products, and the conclusion reflects the properties of nuclear fragments may be an observable probe into the nucleon interactions during heavy ion collisions.