Method for determining counting efficiency in a liquid scintilla

Details Method for determining counting efficiency in a liquid scintilla Method for determining counting efficiency in a liquid scintilla

1985-06-21

1987-10-13

Howell, Janice A.

Radiant energy

Automatic/serial detection of similar sources

250369, G01T 1204

Patent

active

047000724

ABSTRACT:
Method to determine the degree of chemical quench and the degree of color quench in liquid scintillation samples in order to find the correct counting efficiency for the samples. Scintillation pulses produced by the liquid scintillation solution as a result of an isotopic decay or in response to radiation from an external .gamma.-radiating source, are counted in a counter comprising two photodetectors working in coincidence, means for determining the value of one quench parameter dependent on the overall level of quench in the solution, and means for determining the value of another quench parameter predominantly dependent on the level of color quench in the solution. The counting efficiency for the sample can be determined on the basis of these two quench parameters.

REFERENCES:
patent: 3725657 (1973-04-01), Laney
patent: 4085325 (1978-04-01), Atallah et al.
patent: 4292520 (1981-09-01), Jordan
J. G. Ring et al., "Liquid Scintillation Counting, Recent Applications and Development", vol. 1, Ed. C-T. Peng, D. L. Horrock and E. L. Alpen, Academic Press, 1980, p. 89.
James F. Lang in "Organic Scintillators and Liquid Scintillation Counting", Ed. D. L. Horrocks and C. T. Peng, Academic Press, New York, 1971, p. 823.
M. Takieu, T. Natake, and M. Hayashi, Int. J. Appln. Rad. Isot., vol. 34, No. 10, 1983, p. 1483.
H. H. Ross, Analytical Chemistry, vol. 37, No. 4, p. 621, 1965.

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