The Absolute Measurement of the Concentrations of the Radioactive Substances in the Atmosphere, in Tokyo
1959 年 10 巻 2 号 p. 56-63
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1959 年 10 巻 2 号 p. 56-63
Comparing with the already known concentration of radon emanated from the radium standard solution, the absolute measurement of the concentrations of the radioactive substances in the atmosphere was carried out by the ionization chamber method. The concentrations of the radioactive substances in the atmosphere were 2.3-12.0×10-16C/cm3 on fine days.
The ratio of the ionization current by beta-, gamm-raditions to that by total radiations in the air of definite volume is about 5-25 percent, and is very larger than that in radon being in the state of radioactive equilibrium with its decay products (the ratio is about 2-3 percent).
