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Determination of Samarium in rocks by epithermal neutron-activation analysis

Zerstörungsfreie Bestimmung von Samarium in Gesteinen durch Aktivierungsanalyse mit epithermischen Neutronen

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Zusammenfassung

Die Bildung von153Sm ist hierbei im Vergleich zu den meisten störenden Radionukliden beträchtlich größer als bei der Aktivierung mit thermischen Neutronen. Die Präzision des Verfahrens beträgt 2–3% im Bereich von 3–25 ppm, die Empfindlichkeit etwa 0,1 ppm. Für einige Standardgesteine werden die Ergebnisse angeführt. Der Einfluß anderer Nuklide Seltener Erden auf die Messung der 41 keV Röntgenstrahlung von153Sm wurde untersucht.

Summary

A non-destructive neutron-activation method for the determination of samarium in rocks, based on activation with epithermal neutrons, is described. By this means the formation of153Sm, as compared to most interfering radionuclides, is considerably higher than by thermal neutron activation. The precision of the method is 2–3% in the range of 3–25 ppm, and the sensivity is about 0,1 ppm. Results are presented for some standard rocks. The influence of other rare earth nuclides on the measurement of the 41 KeV X-ray of153Sm has been investigated.

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Steinnes, E. Determination of Samarium in rocks by epithermal neutron-activation analysis. Z. Anal. Chem. 247, 23–27 (1969). https://doi.org/10.1007/BF00676495

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Keywords

  • Physical Chemistry
  • Analytical Chemistry
  • Inorganic Chemistry
  • Radionuclide
  • Rare Earth