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pubmed-article:11378935pubmed:dateCreated2001-5-29lld:pubmed
pubmed-article:11378935pubmed:abstractTextThe radon activity concentration in ground water from drilled and dug wells on the horst Söderåsen in Southern Sweden has been determined with two different methods, gamma activity measurements with a germanium HPGe detector and alpha activity measurements with plastic track detectors. The results are consistent. High activity concentration is connected to granite bedrock. Dug wells have low concentrations and no trivial correlation between concentration and depth of the well is found. Large local variations exist. Activity concentrations > 700 Bq/l appear to be associated with leakage from layers of volcanic origin. The concentration from drilled wells is found to be quite constant over a 3 year period but short time variations appear to be significant. Evaporation from the open surface of a normal cooking vessel is slow with an activity gradient delta A/A of about 0.1-0.2 per hour at room temperature whereas even modest heating of water in e.g. a coffee machine is very efficient and reduces the radon activity concentration by > 90% in one process.lld:pubmed
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pubmed-article:11378935pubmed:authorpubmed-author:JönssonGGlld:pubmed
pubmed-article:11378935pubmed:authorpubmed-author:ErlandssonBBlld:pubmed
pubmed-article:11378935pubmed:authorpubmed-author:JakobssonBBlld:pubmed
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pubmed-article:11378935pubmed:volume53lld:pubmed
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pubmed-article:11378935pubmed:pagination145-54lld:pubmed
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pubmed-article:11378935pubmed:year2001lld:pubmed
pubmed-article:11378935pubmed:articleTitleStudies of the radon concentration in drinking water from the horst Söderåsen in southern Sweden.lld:pubmed
pubmed-article:11378935pubmed:affiliationDepartment of Physics, Lund University, P.O. Box 118, S-221 00 Lund, Sweden. bengt.erlandsson@nuclear.lu.selld:pubmed
pubmed-article:11378935pubmed:publicationTypeJournal Articlelld:pubmed