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<datestamp>2018-01-11</datestamp>
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<title lang=en>Determination of the four natural Ra isotopes in thermal waters by gamma-ray spectrometry</title>
<creator>Condomines, Michel</creator>
<creator>Rihs, S.</creator>
<creator>Lloret, E.</creator>
<creator>Seidel, J. L.</creator>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Laboratoire d'Hydrologie et de Géochimie de Strasbourg (LHyGeS) ; École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES) - Institut national des sciences de l'Univers (INSU - CNRS) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Hydrosciences Montpellier (HSM) ; Institut de Recherche pour le Développement (IRD) - Université Montpellier 2 - Sciences et Techniques (UM2) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<source>ISSN: 0969-8043</source>
<source>Applied Radiation and Isotopes</source>
<publisher>Elsevier</publisher>
<identifier>hal-00475587</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00475587</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00475587</source>
<source>Applied Radiation and Isotopes, Elsevier, 2010, 68 (2), pp.384-391. 〈10.1016/j.apradiso.2009.10.056〉</source>
<identifier>DOI : 10.1016/j.apradiso.2009.10.056</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apradiso.2009.10.056</relation>
<language>en</language>
<subject lang=en>Radium isotopes</subject>
<subject lang=en>Gamma-ray spectrometry</subject>
<subject lang=en>Thermal waters</subject>
<subject lang=en>Radium-rad-disks</subject>
<subject lang=en>Broad-energy germanium detector</subject>
<subject>[SDU.STU.GC] Sciences of the Universe [physics]/Earth Sciences/Geochemistry</subject>
<subject>[SDE.MCG] Environmental Sciences/Global Changes</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Our method for the simultaneous determination of the four natural Ra isotopes (Ra-226, Ra-228, Ra-224 and Ra-223) in thermal waters involves a separation of Ra on a selective filter (3 M EMPORE (TM) Radium Rad disk), and a single counting using a broad-energy HPGe detector (BE Ge manufactured by CANBERRA (TM)). The calculation of Ra-223 and (228)a activities requires interference and cascade summing corrections. The Ra-226 activities in CO2-rich thermal waters of the Lodeve Basin (South of France) range from 530 to 2240 mBq/l. The low (Ra-228/Ra-226) activity ratios (0.19-0.29) suggest that Ra is mostly derived from the aquifer carbonates. The short-lived Ra-224 and Ra-223 are probably added to the water through recoil or desorption processes from Th-enriched coatings on the fracture walls.</description>
<date>2010</date>
</dc>
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