Radon and daughter radioactive equilibrium identification system and method

Abstract

The invention discloses a radon and daughter radioactive equilibrium identification system and method. The radon and daughter radioactive equilibrium identification system includes a radiation probe,a data acquisition card, a power spectrum acquisition control unit, a multichannel pulse-height analyzer, an equilibrium identification and display system, wherein the data acquisition card converts an analog pulse signal of the radiation probe into a digital pulse signal; the power spectrum acquisition control unit controls communication of the data acquisition card; the multichannel pulse-heightanalyzer converts the digital pulse signal into gamma power spectrum count; the equilibrium identification and display system performs data processing on the gamma power spectrum count to obtain theequilibrium coefficient; and according to the value range of the equilibrium coefficient, the radon and daughter radioactive equilibrium state can be provided and displayed. The radon and daughter radioactive equilibrium identification system is simple in structure, and dynamically monitors and identifies whether the radon and daughter in active carbon or other bodies containing radon achieve equilibrium.

Description

technical field [0001] The invention relates to the technical field of radioactivity measurement, in particular to a system and method for identifying the radioactivity balance of radon and its progeny. Background technique [0002] Activated carbon has a strong adsorption capacity for radon because of its porosity and large specific surface area. Activated carbon is cheap for measuring radon or radon precipitation rate, and can be reused after baking and drying. No power supply is required for monitoring. It has the advantages of large-scale investigation of radon and radon exhalation rate. As the most ideal integral static radon measurement method at present, activated carbon radon measurement technology has been widely promoted and applied in many fields. [0003] Radon is an alpha particle emitter, so the gamma energy spectrometer cannot directly detect it, but the decay daughters 214Pb and 214Bi of radon adsorbed in activated carbon are the main gamma emitters, when ra...

AI Technical Summary

Problems solved by technology

At present, the method to balance radon and its progeny is to stand still for 2-3 hours, but if the adsorption time is not long enough, the adsorption is uneven, especially when there is radon leakage during standing or measurement, the 2-3 hours of standing The settling time does not necessarily bring radon and its progeny into equilibrium, resulting in inaccurate measurements

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