Highly Time-Resolved Measurements of Airborne Radionuclides by Extremely Low Background γ-ray Spectrometry : Their Variations by Typical Meteorological Events
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In order to investigate variation of concentrations of airborne radionuclides, <SUP>214</SUP>Pb, <SUP>212</SUP>Pb, <SUP>7</SUP>Be, and <SUP>210</SUP>Pb, accompanied with a typical meteorological event, such as passage of cold front, approach of typhoon, and Asian dust (Kosa), highly time-resolved (2-6 hours) measurements of natural radionuclides were performed by ultra low background γ-ray spectrometry. Surface air concentrations of these nuclides showed characteristic temporal changes by each meteorological phenomenon. In addition, variation patterns were found to be obviously different between short-lived <SUP>214</SUP>Pb and <SUP>212</SUP>Pb and long-lived <SUP>7</SUP>Be and <SUP>210</SUP>Pb. One of causes of the difference might be explained by difference of their sources: local for short-lived nuclides and regional for long-lived ones.
- Journal of Nuclear and Radiochemical Sciences
Journal of Nuclear and Radiochemical Sciences 8(1), 5-9, 2007-06-01
The Japan Society of Nuclear and Radiochemical Sciences