COLD NEUTRON RADIOGRAPHIC APPARATUS AND METHOD

摘要

IMPROVED COLD NEUTRON RADIOGRAPHICAPPARATUS AND METHODAn improved cold neutron radiographic apparatusand method are disclosed wherein neutron temperature ismatched to the specific material to be examined. Thiscan be done, in one embodiment, by placing a radioactivesource of neutrons, such as californium 252, in a modera-tor such as solid methane and using a cryogenic refrigera-tion system to cool the moderator to any pre-selectedcryogenic temperature.