The current state of the national primary special standard for the unit of radium mass, GET 7-2011, which was modernized during 2009–2011, is examined. The structure of the standard, the basic physical principles of its operation, and its metrological characteristics are described.
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Translated from Izmeritel’naya Tekhnika, No. 9, pp. 5–8, September, 2013.
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Moiseev, N.N. National Primary Special Standard for the Unit of Radium Mass. Meas Tech 56, 952–956 (2013). https://doi.org/10.1007/s11018-013-0312-0
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DOI: https://doi.org/10.1007/s11018-013-0312-0