MCNP-PoliMi: a Monte-Carlo code for correlation measurements

The Monte-Carlo simulation of correlation measurements that rely on the detection of fast neutrons and photons from fission requires that particle interactions in each history be described as closely as possible. The MCNP-PoliMi11PoliMi stands for Politecnico di Milano. has been developed from the standard MCNP code to simulate each neutron–nucleus interaction as closely as possible. In particular, neutron interaction and photon production are made correlated and correct neutron and photon fission multiplicities have been implemented. The code output consists in relevant information about each collision, for example the type of collision, the collision target, the energy deposited, and the position of the interaction. A post-processing code has also been developed and can be tailored to model specific detector characteristics. These features make MCNP-PoliMi a versatile tool to simulate particle interactions and detection processes. The application of the MCNP-PoliMi code to simulate neutron and gamma ray detection in a plastic scintillator is presented.