Emission of prompt nucleons in heavy ion collisions.

We describe a simple dynamical model for the production of prompt nucleons at the very beginning of a heavy ion collision. Approximations often used in previous calculations (neglect of Pauli blocking, of window velocity and of its extension) have been checked. We apply the model to the calculation of prompt emitted neutrons in incomplete fusion reactions observed on theNe+Ho system at 220, 402 and 700 MeV. Results of the model are extensively discussed. [ABSTRACT FROM AUTHOR]