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- W2076913731 abstract "A method for the determination of Sub-microgram amounts of tantalum and tungsten in rocks and meteorites by neutron activation analysis is described Radiochemical suparation from the components of the irradiated sample was employed to provide sources for measuring 182Ta and 187W by beta and gamma counting and by gamma spectrometry. Determinations of tantalum at the lower limit of 8.10-10 g and tungsten at 2.10-9 g have been made Amongst the materials examined using the method were the intercomparison rocks G1 and W1, rock samples from the Skaergaard Intrusion of East Greenland and a number of iron and stony meteorites In addition a number of standard steel samples of known tungsten content and one of known tantalum content were examined and good agreement was observed between the published results and those determined by activation analysis Une méthode est proposée pour l'ultramicrodosage du tantale et du tungsténe dans les rocher et les météorites par activation au moyen de neutrons Une séparation radiochimique d'avec les composants de l'échantillon irradié a été effectuée en vue de la mesure du 182Ta. et du 187W par comptage beta et gamma et par spectrométrie gamma Ultramikromengen von Tantal und Wolfram in Gesteinen und Meteoriten können durch Aktivierung mit Neutronen bestimmt werden Zur Messung von 182Ta und 187W durch Beta und Gamma-Záhlung und Gamma-Spektrometric wurden die Komponenten der bestrahlten Probe nach radiochemischen Methoden abgëtrennt" @default.
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- W2076913731 date "1960-01-01" @default.
- W2076913731 modified "2023-09-27" @default.
- W2076913731 title "The determination of tantalum and tungsten in rocks and meteorites by neutron activation analysis" @default.
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- W2076913731 doi "https://doi.org/10.1016/s0003-2670(00)88319-1" @default.
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