Abstract
The semiclassical exciton model which is generally used for describing the pre-equilibrium emission at a moderate excitation energy, contains various free parameters; among them the strength factor K of the two-body residual interaction plays an important role in the computation work. With the view of fixing the free parameter K for (n, p) reactions, the excitation functions for about eight nuclei have been calculated using exciton model in combination with Hauser-Feshbach formalism. The average best fit values of the exciton model free parameter K has been found to be K=700 MeV3. Departure from this value appears to cancel out structure effects introduced into transition rates through the structure-sensitive single particle level density.
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