To measure the mass (kilogram) accurately traceable to the Planck constant h, NML is adopting the technique of X-ray Crystal Density (XRCD) method and completing the establishment of new quality standards. We work with PTB, Germany to set up a mass measurement system and a combined XRF XPS system for mass determination and dissemination of the 28Si-enriched sphere.
The implementation of the revised SI would provide quality assurance and traceability and therefore underpin the trade and hi-tech research that require world-class measurement standards.
Posted Date: 2019/03
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