Radiant energy – Invisible radiant energy responsive electric signalling – Neutron responsive means
Patent
1981-06-30
1984-05-08
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
Neutron responsive means
250374, 250385, G01T 118, G01T 300
Patent
active
044477279
ABSTRACT:
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,.alpha.).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.
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Howell Janice A.
IRT Corporation
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