Gamma radiation detection

Details Gamma radiation detection Gamma radiation detection

1994-03-30

1995-09-19

Hannaher, Constantine

Radiant energy

Invisible radiation responsive nonelectric signalling

Optical change type

G01T 104

Patent

active

054517923

ABSTRACT:
A gamma radiation dosimeter comprises a polyester film substrate, of which a central circular region is coated with a gamma-radiation sensitive layer which is covered by an overlayer. The radiation-sensitive layer is formed from styrene-acrylonitrile copolymer and contains 1-bromoadamantane and a leuco dye. The overlayer is formed from an acrylic resin binder containing a UV-absorber. The central region is surround by an annular region which is divided into six equally-sized sections, each of which is printed in a color which corresponds to the color developed in the central region when it has been exposed to successive increasing amounts of gamma radiation. After exposure of the device, the amount of radiation to which the device has been exposed can be determined by comparing the color generated in the region with the colors of the six sections. The color of the section most closely corresponding to that of the central region indicates the dose of gamma radiation which the device, and any other object similarly exposed, has received.

REFERENCES:
patent: 2757292 (1956-07-01), Schulman et al.

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