Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1994-08-02
1996-01-09
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
250362, 250364, 250369, G01T 1202
Patent
active
054830702
ABSTRACT:
A scintillation measurement system for measuring optical events produced by scintillators in response to the radioactive decay of a constituent or constituents of a sample to be measured comprises a sample support for positioning a sample in a sample well; a bismuth germanate (BGO) scintillation crystal, such as Bi.sub.4 Ge.sub.3 O.sub.12, located adjacent the sample well; a plurality of photodetectors located outside the bismuth germanate crystal for detecting optical events occurring in the sample well or in the bismuth germanate crystal and converting those optical events into electrical pulses; and a pulse analyzing system for receiving the electrical pulses from the photodetectors and determining whether such pulses represent .alpha., .beta. or .gamma. events. This system can be used with samples containing .alpha., .beta. and .gamma. emitters, or any combination thereof.
REFERENCES:
patent: 3842278 (1974-10-01), Noakes
patent: 3898463 (1975-08-01), Noakes
patent: 4421986 (1983-12-01), Friauf et al.
patent: 4528450 (1985-07-01), Valenta
patent: 4651006 (1987-03-01), Valenta
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Noakes "The role of auxiliary scintillators for gamma spectroscopy and low-level counting applications" Radiocarbon 1993, pp. 143-156.
Noakes "Low Background Liquid Scintillation Counting using an active sample holder and pulse discrimination electronics", Radiocarbon vol. 31, No. 3, 1989, pp. 332-341.
Bicron Corp. product bulletin SC-103A--BGO Detectors, 1989.
Crismatec product brochure on bismuth germanate crystals, no date.
JTT International flyer on bismuth germanate crystals, no date.
Fields Carolyn E.
Packard Instrument Company
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