Measurements of Ir concentration in geological standard samples using neutron activation analysis with multiple gamma-ray coincidence method

In this study, the Ir concentrations in some standard rock samples were determined by using the multiple γ-ray detection method. The use of the multiple γ-ray detection method, which was developed for nuclide quantification, yielded better resolution and sensitivity than the ordinary singles γ-ray d...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2012, Vol.291 (1), p.143-145
Main Authors: Hatsukawa, Yuichi, Osawa, Takahito, Oshima, Masumi, Toh, Yosuke, Kimura, Atsushi, Koizumi, Mitsuo, Furutaka, Kazuyoshi
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Diagnostic Radiology
Gamma rays
Hadrons
Heavy Ions
Inorganic Chemistry
Measurement
Meteorites
Methods
Nuclear Chemistry
Nuclear Physics
Physical Chemistry
Platinum ores
Sediments (Geology)
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Summary:In this study, the Ir concentrations in some standard rock samples were determined by using the multiple γ-ray detection method. The use of the multiple γ-ray detection method, which was developed for nuclide quantification, yielded better resolution and sensitivity than the ordinary singles γ-ray detection method. Iridium is one of the least abundant elements in Earth’s crust, with an average mass fraction of 0.001 ppm in a crust rock. However, iridium is relatively more abundant (concentration: 0.5 ppm or more) in undifferentiated meteorites. Therefore iridium abundance anomalies in geological samples provide important information about meteorite impact. The standard rock samples used in this study were SARM-76, FC-1 and FC-2. The SARM-76 was prepared from a platinum ore, and issued by the south African bureau of standards. FC-1 and FC-2 were obtained from fish clay sediment samples from Stevens Klint, Denmark.
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-011-1332-3