Radiant energy – Invisible radiant energy responsive electric signalling – Neutron responsive means
Patent
1993-11-12
1995-01-03
Dzierzynski, Paul M.
Radiant energy
Invisible radiant energy responsive electric signalling
Neutron responsive means
25037003, 376257, G01T 1172, G01T 300
Patent
active
053788958
ABSTRACT:
The gamma neutron assay technique is an alternative method to standard safeguards techniques for the identification and assaying of special nuclear materials in a field or laboratory environment, as a tool for dismantlement and destruction of nuclear weapons, and to determine the isotopic ratios for a blend-down program on uranium. It is capable of determining the isotopic ratios of fissionable material from the spontaneous or induced fission of a sample to within approximately 0.5%. This is based upon the prompt coincidence relationships that occur in the fission process and the proton conservation and quasi-conservation of nuclear mass (A) that exists between the two fission fragments. The system is used in both passive (without an external neutron source and active (with an external neutron source) mode. The apparatus consists of an array of neutron and gamma-ray detectors electronically connected to determine coincident events. The method can also be used to assay radioactive waste which contains fissile material, even in the presence of a high background radiation field.
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Aryaeinejad Rahmat
Cole Jerald D.
Greenwood Reginald C.
Dzierzynski Paul M.
EG&G Idaho, Inc.
Hanig Richard
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