Development of digital gamma-activation autoradiography for the determination of platinum group element inclusions in geological samples |
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| Authors: | V P Kolotov A Yu Andriyanov S N Shilobreeva V I Korobkov N N Dogadkin B A Chapyzhnikov Yu M Tsipenyuk |
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| Institution: | (1) Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian Academy of Sciences, Kosygin str., 19, 119991 Moscow, Russia;(2) Lomonosov Moscow State University, Russia;(3) Institute of Physical Problems of Russian Academy of Sciences, Moscow, Russia |
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| Abstract: | It has been shown that gamma-activation significantly extends possibilities of activation autoradiography with respect to
determination of platinum group elements (PGE) in silicate samples. All PGE may be activated by bremsstrahlung with forming
radionuclides having convenient half-lives for autoradiography (hours-days). Digital methods for quantitative 2D-densitometry
of autoradiograph images by means of documents scanners have been developed and discussed. Approaches for increasing selectivity
of analysis by means of autoradiography have been proposed and tested on the real sample containing PGE inclusions (analysis
of decay kinetics while cooling, combination with gamma-ray spectrometry). |
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