Reduced background scintillation counting

Details Reduced background scintillation counting Reduced background scintillation counting

1985-04-08

1987-03-17

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

250363R, 250366, 250369, G01T 1178

Patent

active

046510060

ABSTRACT:
A method and apparatus for separating background events from valid sample events in a liquid scintillation counter are disclosed. Upon the detection of a coincident event pulse the number of pulses detected during a short time interval immediately thereafter together with the energy level of the event pulse is utilized to determine the probability that the event pulse is a valid sample pulse as opposed to an invalid background pulse. The total count rate is determined by summing pulses over the appropriate energy range where each pulse is counted as one multiplied by the above probability that the pulse is a valid sample pulse.

REFERENCES:
patent: 3626187 (1971-12-01), Laney
patent: 4049966 (1977-09-01), Luitwieler, Jr.
patent: 4528450 (1985-07-01), Valenta
patent: 4555629 (1985-11-01), Everett et al.
R. Walraven and Y. Yeh, "Spurious Pulse Rejection in a Photon Correlation Experiment" Review of Scientific Instruments, vol. 50, No. 6, (Jun. 1979), pp. 780-786.
D. Horrocks, "Pulse Shape Discrimination" In: Pulse Shape Discrimination, Applications of Liquid Scintillation Counting (Academic Press, 1974), pp. 276-289.
"RackBeta `Spectral` Liquid Scintillation Counter" Technical Description 1219 LKB Wallac (Finland), no date.
"LS5801 Series Liquid Scintillation Systems" Bulletin 7749 Beckman Instruments, Inc., no date.
"The TRI-CARB.RTM. 460C Automatic-Liquid Scintillation System" Operation Manual Publication No. 169-2185/B Packard Instrument Co., Inc. (USA 1980).

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