Quench determination in liquid scintillation counting systems

Details Quench determination in liquid scintillation counting systems Quench determination in liquid scintillation counting systems

1976-06-07

1978-02-21

Dixon, Harold A.

Radiant energy

Automatic/serial detection of similar sources

250252, G01T 100

Patent

active

040754804

ABSTRACT:
Method and apparatus for measuring the degree of quench in a liquid scintillation sample by irradiating the sample with a standard source, such as a cesium-137 gamma source, to produce a Compton scattered electron distribution exhibiting a Compton edge configuration as the leading edge thereof. For increasing the quench levels in the sample, the Compton edge shifts to lower pulse height values and the extent of this shift is indicative of the degree of quench. To measure the degree of quench, a unique point on the Compton edge, namely the point at which the second derivative of the edge is zero (i.e. the inflection point), is measured for the quenched sample and the pulse height value corresponding to the inflection point is determined. The pulse height value is compared with the pulse height value determined for a calibration standard in a similar manner, the difference in pulse height values indicating the degree of quench.

REFERENCES:
patent: 3381130 (1968-04-01), Nather
patent: 3715584 (1973-02-01), Rosenstingl
patent: 3721824 (1973-03-01), Bristol

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