Schery S D
Health Phys. 1985 Dec;49(6):1061-7. doi: 10.1097/00004032-198512000-00002.
Measurements have been made at varied locations within the United States comparing the concentration of 212Pb in air with that of the progeny of 222Rn to see if 212Pb is typically a significant contributor to indoor radioactivity. Auxiliary measurements were made comparing 220Rn with 222Rn. In terms of potential alpha-particle energy, 212Pb is significant (the ratio of its contribution to the combined contribution of 218Po, 214Pb, and 214Bi averaged about 0.6) and may warrant greater consideration as a component of indoor radioactivity. Correlations were found between the concentration of 220Rn progeny and 222Rn progeny, and the concentration of 220Rn and 222Rn. Environmental factors such as transport pathways and ventilation rates which exert a common influence on the concentrations of airborne isotopes provide a possible explanation for these correlations.
在美国不同地点进行了测量，比较空气中212Pb的浓度与222Rn子体的浓度，以确定212Pb是否通常是室内放射性的重要贡献者。还进行了辅助测量，比较220Rn和222Rn。就潜在的α粒子能量而言，212Pb很重要（其贡献与218Po、214Pb和214Bi的综合贡献之比平均约为0.6），可能需要作为室内放射性的一个组成部分给予更多考虑。发现220Rn子体浓度与222Rn子体浓度之间以及220Rn浓度与222Rn浓度之间存在相关性。对空气中同位素浓度有共同影响的运输途径和通风率等环境因素为这些相关性提供了一种可能的解释。
