Method and device for measuring radon exhalation rate on medium surface
A medium surface, radon extraction rate technology, applied in the field of nuclear radiation detection, can solve the problems of long measurement time, large measurement result error, no consideration of interference, etc., to eliminate the influence of humidity, meet the effect of rapid measurement, and improve sensitivity
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[0030] A method for measuring the exhalation rate of radon on the surface of a medium, which includes a measurement process and a calculation process:
[0031] 1. Measurement process
[0032] The radon accumulating chamber is fastened on the surface of the medium to be tested, because the radon atoms in the medium escape from the surface and enter the radon accumulating chamber under the action of diffusion and seepage, and the radon in the radon accumulating chamber escapes due to leakage and back diffusion. The above factors lead to The variation of radon concentration in radon accumulating room. Connect a sealed measuring chamber with the radon accumulating chamber to form a loop. After collecting for a certain time T-5 minutes, turn on the pump and use a small flow rate of gas to mix the radon accumulating chamber with the radon in the measuring chamber for 5 minutes. The radon concentration in the small room is the radon concentration in the accumulating radon chamber at...
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