Effects of heating on the emanation rates of radon-222 from a suite of natural minerals

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
E Garver, M Baskaran

Abstract

The emanating power of radon provides information on the internal structure of a mineral and the radiation damage caused by the decay of 238U, 235U and 232Th (and their daughters) that are present in the mineral. The concentration of 222Rn in groundwater is primarily controlled by the concentration of U and Th in the underlying rocks, as well as the emanation coefficient for that particular rock. The variations in the emanation coefficient for 222Rn caused when subsurface rocks are subjected to tectonic forces results in changes in 222Rn in groundwater. Increased emanation rates of radon from a mineral grain can potentially alter the 238U-206Pb, 235U-207Pb and 232Th-208Pb chronological clocks. We have measured radon emanation coefficients on a suite of minerals comprised of one oxide (uraninite), three silicates (thorite, zircon, and cerite) and one phosphate (monazite) at room temperature and after heating at 200 degrees C and 600 degrees C. Annealing of some of the nuclear tracks within a mineral significantly reduces the emanation rates of radon in these minerals, suggesting that the tracks created by decay events serve as conduit pathways for the release of 222Rn. Higher emanation rates of 222Rn from mineral grains that are...Continue Reading

References

Aug 28, 1999·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·N E Whitehead, G L Lyon
Sep 6, 2000·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·T A Przylibski

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Citations

Jun 30, 2012·International Journal of Plant Genomics·Weifan GaoDavid M Stelly
Sep 24, 2013·Environmental Science and Pollution Research International·Devi Prasad MishraR Lokeswara Patnaik
Jan 15, 2014·Journal of Environmental Radioactivity·Patitapaban SahuNarendra Kumar Sethy
Jul 12, 2011·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·Akihiro SakodaKiyonori Yamaoka
Nov 26, 2010·Journal of Environmental Radioactivity·M Baskaran
Feb 2, 2010·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·Akihiro SakodaKiyonori Yamaoka
Sep 1, 2009·Journal of Hazardous Materials·V JobbágyT Kovács
Aug 2, 2008·The Science of the Total Environment·Dániel BreitnerCsaba Szabó
Oct 3, 2006·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·Akihiro SakodaKiyonori Yamaoka
Jul 24, 2012·Journal of Environmental Radioactivity·Frédéric Girault, Frédéric Perrier
Nov 25, 2020·Radiation Protection Dosimetry·Asheesh MishraD C Panigrahi
Jan 15, 2019·The Science of the Total Environment·Frédéric Girault, Frédéric Perrier
Jun 17, 2021·Radiation Protection Dosimetry·N ChitraB Venkatraman

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