Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1997-06-11
2000-05-16
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
25036309, 25026903, 2502521, 250366, G01T 1202
Patent
active
060640685
ABSTRACT:
A system for on-line monitoring the stability of a scintillation detector, comprises means providing two beams of gamma rays from a subsidiary source which are distinguishable because of their time relationship from the primary source. The two beams are of similar energies but are oriented in different directions, with one directed into the scintillation detector and one acting as a reference beam and directed to a reference beam counter. The ratio of the detector-count rate for the timed events to the reference count rate is compared to provide an indication of any drift in the scintillation detector.
REFERENCES:
patent: 4772792 (1988-09-01), Utts et al.
Hannaher Constantine
Institute of Geological & Nuclear Sciences Ltd.
Israel Andrew
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