Contraband detection system using direct imaging pulsed fast neutrons
This patent describes contraband detection apparatus. It comprises means for irradiating an object under investigation with a collimated pulsed beam of fast neutrons having a pulse width of less than 5 nanoseconds; first detecting means for detecting gamma rays emitted from the object as a result of interactions between a neutron from the pulsed beam of fast neutrons and an atomic nucleus within the object; identifying means for identifying a particular atomic element which gives rise to a particular detected gamma ray; locating means for determining the approximate location within the object of the origin of each gamma ray detected by the detecting means without the necessity of detecting associated particles; and second detection means responsive to the irradiating means, identifying means and locating means for detecting a distribution and concentration of at least one atomic element within the object indicative of the presence of contraband.
- Assignee:
- Science Applications International Corp., San Diego, CA (United States)
- Patent Number(s):
- US 5076993; A
- Application Number:
- PPN: US 7-464111
- OSTI ID:
- 5589391
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
665300* -- Interactions Between Beams & Condensed Matter-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARYONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
EQUIPMENT
FAST NEUTRONS
FERMIONS
GAMMA RADIATION
HADRONS
IMAGES
IONIZING RADIATIONS
IRRADIATION
MATERIALS
MEASURING INSTRUMENTS
NEUTRONS
NUCLEONS
PULSES
RADIATION DETECTORS
RADIATIONS