Personal gamma-ray and radon monitor

Details Personal gamma-ray and radon monitor Personal gamma-ray and radon monitor

1990-05-09

1992-07-28

Fields, Carolyn E.

Radiant energy

Invisible radiation responsive nonelectric signalling

250253, 250255, 2504841, G01T 102, G01T 111

Patent

active

051342979

ABSTRACT:
A compact electrically conductive housing includes a plurality of access ports defined in the top section of the housing to permit radon gas (.sup.222 Rn) to diffuse into the housing. The access ports are covered by a diffusion barrier such as a layer of foam rubber sheet inside the housing. The bottom section of the housing includes an integrally molded, electrically conductive pedestal having three recessed wells therein. Two wells contain a stacked pair of an SSNTD on top of a calcium fluoride TLD. The third well contains the same components, but with the TLD on top of the SSNTD, and the TLD of this stacked pair is pre-dosed with gamma-rays. The pedestal is covered with a film of electrically neutral aluminized MYLAR (polyester film).

REFERENCES:
patent: 3505523 (1970-04-01), Becker
patent: 4417142 (1983-11-01), Malmqvist et al.
patent: 4800272 (1989-01-01), Harley et al.

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