Criticality control, measuring, monitoring, surveying, detecting, assaying, analysis and information gathering apparatus and instruments, principally for radioactive, fission product and health physics use, namely, neutron coincidence counting systems comprised of neutron detectors, amplifiers and computer hardware and software used to measure the plutonium and uranium content of items, the plutonium isotopic composition of items, the plutonium to uranium ratio of items and the uranium enrich...

neutron coincidence counting system comprised of neutron detectors, amplifiers and computer hardware and software used to measure the plutonium and uranium content of items, the plutonium isotopic composition of items, the plutonium to uranium ratio of items and the uranium enrichment of items; and gamma-ray spectrometry system comprised of gamma-ray detectors, collimators, amplifiers and computer hardware and software used to measure the plutonium isotopic composition of items and the pluton...