used to describe light-particle evaporation which can occur all along the fission path. As a general microscopic treatment is completely out of scope, different theoretical approaches based on a more or less classical picture [@GPW79]-[@Fro98] have been proposed.

We have developed such a model describing the time evolution of a highly excited rotating nucleus and its subsequent decay through symmetric fission with pre-fission light-particle emission [@PBR96]. The aim of the present paper is to extend our theory to lower energy. Through a comparison with the available experimental data, in particular fission-fragment mass distributions and neutron pre-scission multiplicities, we hope to get some valuable information on the behavior of transport coefficients at low energy.\

Evolution of an excited rotating nucleus towards fission
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To study the time evolution of an excited rotating nucleus, the system is assumed to follow a stochastic Langevin equation of motion [@PoStru90] of one or several collective variables that describe in an appropriate and sufficiently flexible way the deformation of the nucleus along its path to fission .\

Description of nuclear shapes
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To describe the large variety of deformed shapes that can appear in the fission process, the Trentalange–Koonin–Sierk (TKS) nuclear shape parametrization [@TKS80] is used. 