In NDP, a thermal or cold neutron beam passes through a material and interacts with isotopes that emit monoenergetic charged particles upon neutron absorption; either a proton or an alpha, and a recoil nucleus.
In Nuclear Data Processing (NDP), a neutron beam is directed at a material, causing it to interact with isotopes. Upon absorbing the neutron, these isotopes release monoenergetic charged particles, such as protons or alpha particles, along with a recoiling nucleus.