Neutron multiplicity measurements are a useful technique for the characterization of special nuclearmaterial. This technique relies on the detection of correlated neutrons from fission events. As correlatedevents are detected it is possible to determine the neutron multiplicity distribution for the sample. Thisdistribution is useful for identifying the material and estimating the mass. This work focuses on theability of the Monte Carlo code MCNP-PoliMi to simulate measured distributions. The exp ...