Eur. Phys. J. D 3, 237-243 (1998)
https://doi.org/10.1007/PL00021587

Langevin description of fission of hot metallic clusters

Hahn-Meitner-Institut Berlin, Glienicker Straße, 14109 Berlin, Germany

Corresponding author: ^a froebrich@hmi.de

Received: 10 March 1998
Revised: 5 June 1998
Accepted: 17 June 1998
Published online: 13 August 2013

Abstract

A dynamical model of fission of hot charged metallic clusters on the basis of Langevin equations is proposed, where the viscosity is taken from experimental data for the bulk. As an example the process is considered. Decay rates calculated with the full Langevin equations are compared with those of the overdamped limit, which turns out to be a good approximation. Comparison is also made with the Bohr-Wheeler rate, the quasi-stationary Kramers rate, and a rate derived from a mean first passage time approach. A fission delay is predicted which is two orders of magnitude larger than in a calculation without dissipation. This is an order of magnitude larger than the corresponding effect in nuclear fission, where in contrast to the cluster case the fission delay due to friction is well established experimentally. A comparison is also made with the competing decay channels , , and , which are treated as evaporation processes.