METHOD OF DETERMINING VOLUME ACTIVITY OF BETA-IRRADIATING RADIONUCLIDES IN WATER OBJECTS BY METHODS OF REGISTERING VAVILOV-CHERENKOV IRRADIATION WITH TAKING INTO ACCOUNT EFFECTS OF SUPPRESSION Russian patent published in 2013 - IPC G01J3/00 

FIELD: chemistry.

SUBSTANCE: samples are additionally measured with application of control source with known additional activity of beta-irradiating radionuclides, and content of target radionuclide is determined by formula $$a=\frac{n_{CS}\cdot \left(n_S-n_B\right)}{\left(n_{CS+S}-n_S\right)\cdot E\cdot V},$$ where a is volume activity of target radionuclide, Bq·dm^-3; n_S is rate of pulse count, registered in measurement of liquid sample, s^-1; n_B is rate of count of measurement means background pulses, s^-1; E is efficiency of measurement means, determined by measurement of known activity of beta-irradiating radionuclides in bidistillate, fraction; n_CS is rate of pulse count registered in measurement of control source in bidistillate, s^-1; n_CS+S is rate of pulse count, registered in measurement of liquid sample together with control source, s^-1; V is volume of measuring cuvette, dm^-3.

EFFECT: simplification of determination of beta-irradiating radionuclide activity in liquid samples of complex chemical composition.

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