The GNASH preequilibrium-statistical nuclear model code

This paper is based on materials presented in a series of lectures, which were designed to describe the GNASH preequilibrium statistical model code and its use. An overview is provided of the code and emphasis upon the code's calculational capabilities and the theoretical models that have been implemented in it. Two sample problems are discussed, the first dealing with neutron reactions on 58Ni. The second illustrates the fission model capabilities implemented in the code and involves n + 235U reactions. Finally a description is provided of current theoretical model and code development underway. Examples of calculated results using these new capabilities are also given