Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1991-09-09
1993-01-19
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
250369, G01T 1204
Patent
active
051809168
ABSTRACT:
The present invention provides a scintillation counter that includes a measuring chamber accommodated to take the sample and viewed by two photodetectors, preferably photomultipliers, that can be operated in coincidence. Associated with the chamber is an additional scintillator, preferably an inorganic crystal scintillator, optically isolated from the chamber by a light-permeable wall and mounted so that the scintillation light generated in the additional scintillator is guided predominantly only to one of the two photodetectors. A comparator is used for registering pulse amplitude disparity between the photodetectors to distinguish low-disparity, sample generated pulses and high-disparity, additional scintillator generated pulses.
REFERENCES:
patent: 3898463 (1975-08-01), Noakes
patent: 4833326 (1989-05-01), Valenta et al.
patent: 4931649 (1990-06-01), Czirr et al.
Lehtinen Kauko
Oikari Timo
Yrjonen Tapio
Hanig Richard
Howell Janice A.
Wallac Oy
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