Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1991-12-11
1993-06-08
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
25036301, 25037006, 25037011, G01T 1167
Patent
active
052182088
ABSTRACT:
A device for measuring radioactive contamination of a body includes a scintillator crystal (1) sensitive to gamma radiation emitted during disintegration of the radioactive elements (I, Cs, Co) contaminating a body to which the end of scintillator (1) is applied. A photodiode (2) converts the photons generated in scintillator (1) by the gamma radiation into electric charges. A mechanism (3, 7) converts these charges into amplified, frequency-filtered voltage pulses. Pulse counts in a plurality of bands and deconvolution effected by an electronic mechanism (8) built into the device allow measurement of the contamination of the body by each of the radioactive elements in question.
REFERENCES:
patent: 4536841 (1985-08-01), Waechter et al.
patent: 4649276 (1987-03-01), Suzuki
patent: 5057690 (1991-10-01), Morgan et al.
G. A. Petrillo, R. J. McIntyre, R. Lecomte, G. Lamoureux and D. Schmitt, "Scintillation Detection with Large-Area Reach-Through Avalanche Photodiodes". IEEE Transactons on Nuclear Science, vol. NS-31, No. 1 Feb. 1984) pp. 417-423.
K. Kandiah, A. J. Smith and G. White, "A Pulse Processor for X-Ray Spectrometry with Si(Li)-Detectors." IEEE Transactions on Nuclear Science, vol. NS-22, No. 5 (Oct. 1975) pp. 2058-2065.
Dale G. Olson and Michael S. Cole, "On-Line Quantitative Gamma Spectrometry with Computerized Data Reduction." Analytical Chemistry, vol. 47, No. 1 (Jan. 1975) pp. 75-79.
Augier Patrick
Chapuis Jean-Claude
Chemtob Maurice
Chuiton Rene
Fouquet Paul-Henri
Commissariat a l''Energie Atomique
Hannaher Constantine
L'Etat Francais
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