Chlorine-39 in rainfall at a temperate latitude (40^oN) [An article from: Journal of Environmental Radioactivity]

This digital document is a journal article from Journal of Environmental Radioactivity, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

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Rainwater samples were collected and measured for the radioactivity to confirm the presence of Chlorine-39 (T"1"/"2=56.2min) formed by the interaction of cosmic-ray slow negative muons, @m^- with Argon-40 in the lower atmosphere. The presence of ^3^9Cl was confirmed by estimating the half-life of a radionuclide present in the rainwater ranging from 58 to 63min and averaging 60.4min. The disintegration rate of this radionuclide varied from 2.1 to 2.7BqL^-^1 (125-160dpm/L) of rainwater and averaged 2.3BqL^-^1 (140dpm/L) of rainwater in Thessaloniki (40^o38'N, 22^o58'E), Northern Greece. This concentration is indicative of mid or temperate latitudes. This is clearly less than that reported in the literature, 1.7BqL^-^1 (100dpm/L) of rainwater, for a southern latitude 31^o54'N, 34^o49'E (Rehovot, Israel), due to the latitudinal effect of cosmic radiation. ...Read more

Chlorine-39 in rainfall at a temperate latitude (40^oN) [An article from: Journal of Environmental Radioactivity]

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