Large area neutron proportional counter and portal monitor detector

Patent · Tue May 08 04:00:00 EDT 1984

OSTI ID:6315421

Friesenhahn, S J

A large area neutron proportional counter is constructed utilizing a large sealed metal box. The interior walls of the box are coated with /sup 6/Li enriched metal. A multicelled proportional counter structure within the internal space defined by the box is fabricated using a hydrogenous plastic. The interior of the box is filled with a counting gas. Wires running through the box, and insulated therefrom, are raised to a suitably high potential so that the counting gas functions in the proportional region to amplify and collect charge from ionizing events in the gas, the wires acting as a anodes and the box as cathode. The cell dimensions are chosen so that /sup 6/Li(n,a)/sup 3/H reaction products will, with high probability, stop in the gas. Compton electrons, on the other hand, will mostly be stopped in the walls or in the hydrogenous plastic cell boundaries. An array of such counters may be utilized for detection of neutron emitting materials passing through a portal.

• Assignee: IRT Corporation
• Patent Number(s): US 4447727
• OSTI ID: 6315421
• Country of Publication: United States
• Language: English

Related Subjects

440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ALKALI METAL COMPOUNDS
ALKALI METAL ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
COATINGS
DESIGN
DETECTION
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
LITHIUM 6
LITHIUM COMPOUNDS
LITHIUM ISOTOPES
MATERIALS
MEASURING INSTRUMENTS
MULTIWIRE PROPORTIONAL CHAMBERS
NEUTRON DETECTION
NEUTRON DETECTORS
NEUTRON SOURCES
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PARTICLE SOURCES
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
PROPORTIONAL COUNTERS
RADIATION DETECTION
RADIATION DETECTORS
RADIATION SOURCES
RADIOISOTOPES
STABLE ISOTOPES
SYNTHETIC MATERIALS
TRITIUM
WALLS
YEARS LIVING RADIOISOTOPES