2. Neutron and gamma cross sections. Processing

The microscopic effective cross-section is a physical quantity that characterizes the occurrence of a particular interaction (absorption, scattering, fission, etc.) between an incident particle and a target nucleus or atom. The different types of cross section corresponding to different degrees of finesse in describing particle-matter interaction are defined in the article [BN 3 011] , along with their respective units. For a given energy of the incident particle, a microscopic (scalar) effective cross-section is often expressed in cm ² or barn...