Method for rapidly measuring 222Rn and 220Rn daughter concentration in air in terms of alpha general count
A 222rn, air technology, applied in the field of nuclear radiation detection, can solve the problem of high price of energy spectrometer
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Embodiment 1
[0063] Embodiment one, a kind of total counting of α particle is utilized to measure in the air 222 Rn, 220 The method of Rn daughter body, the present embodiment adopts 222 Rn, 220 The Rn daughter collection system consists of a sampling head 1 with a filter membrane 6, a sampling rod 2, a flow meter 3, a connecting pipe 4 and an air sampling pump 5, the sampling head 1 is connected to the sampling rod 2, and the sampling rod 2 and the flow meter 3 The flow meter 3 is connected with the air sampling pump 5 through the connecting pipe 4 .
[0064] The radon progeny in the air is collected on the filter membrane 6 by the air sampling pump 5, and then the total count of α decay on the filter membrane 6 is measured, so as to calculate the air concentration of the radon progeny.
[0065] This measurement method is based on the following conditions:
[0066] 1) During the sampling process 222 Rn, 220 Rn daughter body concentration and air sampling pump 5 sampling flow rates a...
Embodiment 2
[0106] Embodiment two, a kind of total counting of α particles is used to measure the 222 Rn, 220 The method of Rn daughter body, the 222Rn, 220Rn daughter body collection system that present embodiment adopts is made up of sampling head 1, sampling rod 2, flowmeter 3, connecting pipe 4 and air sampling pump 5 with filter membrane 6, sampling head 1 It is connected with the sampling rod 2, the sampling rod 2 is connected with the flow meter 3, and the flow meter 3 is connected with the air sampling pump 5 through the connecting pipe 4.
[0107] The radon progeny in the air is collected on the filter membrane 6 by the air sampling pump 5, and then the total count of α decay on the filter membrane 6 is measured, so as to calculate the air concentration of the radon progeny.
[0108] This measurement method is based on the following conditions:
[0109] 1) During the sampling process 222 Rn, 220 Rn daughter body concentration and air sampling pump 5 sampling flow rates are co...
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