An algorithm for generating random variates from the Madland-Nix fission energy spectrum

An algorithm for generating random variates from the Madland-Nix fission energy spectrum assuming a constant compound nucleus cross section is given based on physics considerations. A program was written to generate variates using the algorithm developed, and it was shown that the generated variates match the probability density function. This algorithm can be used by Monte Carlo particle transport codes to sample secondary energies for neutrons born from fission when the underlying data is given as parameters to a Madland-Nix energy spectrum.