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On the characteristics of the wet deposition process using radon as a tracer gas.Radiation protection dosimetry, 160 1-3
- Publisher
- Oxford University Press
- Copyright
- The Author 2015. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissionsoup.com
- ISSN
- 0144-8420
- eISSN
- 1742-3406
- DOI
- 10.1093/rpd/ncv220
- pmid
- 25911410
- Publisher site
- See Article on Publisher Site
Abstract
Continuous observation of radioactivity ratio of 214Bi to 214Pb as tracers in rainwater was carried out with 15-min cyclic measurement at Nagoya, Japan, from August 2011 to July 2012 to characterise wet deposition. The ratio ranged from 0.55 to 3.82. Based on the observation and a simplified time evolution model of 214Pb and 214Bi radioactivities during rainwater formation, the age of raindrops ranged from sub-10 to several 100 min. The age would have negative correlation to rainfall intensity, but its variation for lower rainfall intensities was quite large. Secular equilibrium of 214Pb and 214Bi radioactivities in cloud water with airborne radon did not hold for some rainfall events.
Journal
Radiation Protection Dosimetry – Oxford University Press
Published: Nov 24, 2015