Abstract
WE have recently examined a number of bars of silver of East European origin for their radioactivity level. Out of a series of a hundred bars, we have radio-assayed seven bars picked at random. Engraved on the base of the bars are, among other engravings, the weight in grams (on the average 11,100 g); the number 999 (ref. 8), most probably indicating the purity; and the number 1971, presumably the year of manufacture.
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References
Nuclear Data Sheets, Section B, 7, No. 1, 55 (January 1972).
Nuclear Data Sheets, Section B, 5, No. 5, 512 (May 1971).
BNL-325, Neutron Cross-sections, second ed., Suppl. No. 2 (1966).
Kedrovskiy, O. L., UCRL-Trans-10411, Lawrence Radiation Laboratory (1970).
Werth, G. L., Nucl. Technol., 11, 280 (1971).
Kernenergiewet, Uitvoeringsvoorschriften (C-2), art. 6, 1a (Staatsblad 404, September 10, 1969).
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LINDNER, L., BRINKMAN, G. & SCHIMMEL, A. Appearance of Low-level Radioactive Silver on the World Silver Market. Nature 240, 463–464 (1972). https://doi.org/10.1038/240463a0
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DOI: https://doi.org/10.1038/240463a0
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