Novel system and method of measuring concentration of radon in water

Abstract

The invention discloses a novel system and method of measuring concentration of radon in water. The novel system of measuring concentration of radon in water includes successively connected first Gamma detector, first linear amplifier, first single-channel pulse-height analyzer, first delay shaping circuit and first scaler, and successively connected second Gamma detector, second linear amplifier,second single-channel pulse-height analyzer, second delay shaping circuit and second scaler, wherein the output terminal of the first delay shaping circuit and the output terminal of the second delayshaping circuit are connected to the input terminal of a coincidence circuit; the coincidence output terminal of the coincidence circuit is connected with a third scaler; the novel system of measuring concentration of radon in water also includes a calculation module which is used for calculating the activity concentration C<222><Rn>: C<222><Rn>=n<Gamma Gamma 1> - n) / V<Elipson> <Gamma Gamma>of 222Rn in a sample to be measured, wherein n<Gamma Gamma 1> is the counting rate of the third scaler during the process of measuring the sample to be measured; n is the background counting rateof the third scaler; V is the volume of the sample to be measured; and Epsilon <Gamma Gamma> is the detection efficiency of a coincidence channel. The novel system and method of measuring concentration of radon in water can quickly reduce the measurement background and can achieve the effect of quickly and accurately measuring the concentration of radon in water.

Description

technical field [0001] The invention belongs to the technical field of radon concentration measurement in water, and in particular relates to a novel measurement system and method for radon concentration in water. Background technique [0002] Radon in water can induce the occurrence of human lung cancer and gastric cancer, and earthquakes can be predicted according to the sharp change of radon concentration in groundwater. There are various methods for measuring radon concentration in water, which can be divided into passive measurement and active measurement. Active measurement is to "drive out" the radon in the water by bubbling, then measure it in the form of measuring the radon concentration in the air, and finally convert it into the radon concentration in water according to the relational formula. The methods include: electret method, scintillation chamber method etc.; Passive measurement means direct measurement of radon concentration in water, methods include: liqu...

AI Technical Summary

Problems solved by technology

People are paying more and more attention to their physical and mental health and property safety. Seismic monitoring workers have higher requirements for the real-time and accuracy of earthquake precursor observation. The traditional method of measuring radon concentration in water cannot meet the requirements.

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