Cold neutron radiographic apparatus and method

摘要

An improved cold neutron radiographic apparatus and method are disclosed wherein neutron temperature is matched to the specific material to be examined. This can be done, in one embodiment, by placing a radioactive source of neutrons, such as californium 252, in a moderator such as solid methane and using a cryogenic refrigeration system to cool the moderator to any pre-selected cryogenic temperature.