Skobeltsyn Institute of Nuclear Physics
Lomonosov Moscow State University

The paper describes a software package designed to simulate an experiment to study
photonucleon reactions by measuring the residual activity. The calculations of the cross sections
and yields of photonucleon reactions, the number of product nuclei photonucleon reactions and their
decay products, the spectrum of gamma rays produced in the irradiated sample, and the spectrum
measured by the detector are describes in detail. A comparison of simulation results with the results
of real experiments is given.