Radiant energy – Invisible radiation responsive nonelectric signalling – Luminescent device
Patent
1987-11-13
1989-08-01
Howell, Janice A.
Radiant energy
Invisible radiation responsive nonelectric signalling
Luminescent device
2504731, 2504851, G01T 110
Patent
active
048535486
ABSTRACT:
A device including a dosimeter badge containing a preset quantity of an aromatic endoperoxide, AO.sub.2, for example the endoperoxide of rubrene or of 9,10-di-phenylanthracene in an organic matrix containing atoms of a high atomic number such as liquid O-dichlorobenzene or solid-P-dichlorobenzene. When exposed to ionizing radiation the aromatic endoperoxide decomposes to produce the fluorescent aromatic. After exposure, the badge is fluorometrically detected by exposing the pre-set quantity of light radiation and the fluorometric result measured, and a system for doing this is also disclosed. The badge preferably is constructed so as to contain two identical samples of the AO.sub.2, one of which is shielded from ionizing radiation (by, e.g., lead foil envelope) during exposure use, and the other of which is unshielded to such hard radiation while both samples are shielded against light and untraviolet radiation. The two samples are thereafter unshielded and fluorescence of the two samples is compared and measured against an absolute scale in a conventional fluorimeter.
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Hannaher Constantine
Howell Janice A.
Kinney Richard G.
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