NON-INTRUSIVE METHOD TO IDENTIFY PRESENCE OF NUCLEAR MATERIALS USING ENERGETIC PROMPT NEUTRONS FROM PHOTON-INDUCED FISSION

Methods and systems for non-intrusively detecting the existence of fissile matenals in a container via the measurement of energetic prompt neutrons are disclosed The methods and systems use the unique nature of the prompt neutron energy spectrum from photo- fission apsing from the emission of neutro...

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Bibliographic Details
Main Authors BERTOZZI, William, LEDOUX, Robert J
Format Patent
LanguageEnglish
French
German
Published 25.03.2020
Subjects
CONVERSION OF CHEMICAL ELEMENTS
DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
PHYSICS
RADIOACTIVE SOURCES
TESTING
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Summary:Methods and systems for non-intrusively detecting the existence of fissile matenals in a container via the measurement of energetic prompt neutrons are disclosed The methods and systems use the unique nature of the prompt neutron energy spectrum from photo- fission apsing from the emission of neutrons from almost fully accelerated fragments to unambiguously identify fissile matepal The angular distribution of the prompt neutrons from photo-fission and the energy distribution correlated to neutron angle relative to the photon beam are used to distinguish odd-even from even-even nuclei undergoing photofission The independence of the neutron yield curve (yield as a function of electron beam energy or photon energy) on neutron energy also is also used to distinguish photo-fission from other processes such as (y, n) Different beam geometpes are used to detect localized samples of fissile matenal and also fissile matenals dispersed as small fragments or thin sheets over broad regions
Bibliography:Application Number: EP20080830535