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KMID : 0364919770020010009
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Journal of Radiation Protection and Research
1977 Volume.2 No. 1 p.9 ~ p.16
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Measurement of Radon Daughters in Airborne Dust
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Kim, Pill Soo/金弼洙
Kim, Duck Kee/Ro, Seung Gy/金德基/魯聖基
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Abstract
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A simple method has been established for determining RaA, RaB and RaC concentrations in airborne dust. This is to evaluate the concentration from measurement of total alpha activities in three selected-time intervals after an air sample is taken from the membrane filter paper (mean pore size: 0.8μm). As a preliminary trial, a time-variation of the concentrations has been determined using the single-filter method at the KAERI site (N. Lat. 37˚38´ and E. Long 121˚15´), Seoul, Korea.
It appears that there is a large variation of the concentrations depending on the sampling time. Generally the highest value was observed in the morning that may coincide with the highest density of atmosphere in a day while the lowest value was obtained around fourteen o´clock.
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