Langevin description of fusion, deep-inelastic collisions and heavy-ion-induced fission

On stochastic approaches of nuclear dynamics

As the study of Brownian movement is the key to the understanding of all dissipative phenomena, the author uses it to introduce the concepts which are then made use of in a specific dissipative model. The author discusses the 'one-body dissipation model' in its richness of phenomena and compares its predictions to measured data. Special attention is paid to the non-equilibrium relation between friction (or mobility) and diffusion.

https://iopscience.iop.org/article/10.1088/0034-4885/50/8/001/pdf

Transport phenomena in dissipative heavy-ion collisions: the one-body dissipation approach

Open quantum systems and the damping of collective modes in deep inelastic collisions

A new procedure is developed for calculating the charge, mass, and kinetic energy distributions of quasifission products. The quasifission is treated within a transport model which describes a master equation for the evolution of the dinuclear system in charge and mass asymmetries and its decay along the internuclear distance. The calculated yields of quasifission products and their distributions in kinetic energy are in agreement with recent experimental data of hot fusion reactions leading to superheavy nuclei. The importance of shell and deformation effects in quasifission is noted. The preneutron and postneutron emissions as well as the fission of a heavy nucleus in the dinuclear system are considered.

J. Randrup

Papers

Theory of transfer-induced transport in nuclear collisions