Reproducibility of the Realization of the Kilogram Based on the Planck Constant by the XRCD Method at NMIJ

Reproducibility of the Realization of the Kilogram Based on the Planck Constant by the XRCD Method at NMIJ

The new definition of the kilogram based on the Planck constant was implemented in May 2019. The National Metrology Institute of Japan (NMIJ) will realize the new kilogram by the X-ray crystal density method using a 28 Si-enriched sphere. An international comparison of the realizations of the new ki...

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Veröffentlicht in:IEEE transactions on instrumentation and measurement 2021, Vol.70, p.1-9
Hauptverfasser: Kuramoto, Naoki, Mizushima, Shigeki, Zhang, Lulu, Fujita, Kazuaki, Okubo, Sho, Inaba, Hajime, Azuma, Yasushi, Kurokawa, Akira, Ota, Yuichi, Fujii, Kenichi
Format: Artikel
Sprache:eng
Schlagworte:
Crystals
Ellipsometry
kilogram
Metrology
Optical interferometry
Photoelectron spectroscopy
Planck constant
Plancks constant
Reproducibility
Silicon
silicon crystal
Surface properties
Volume measurement
X-ray photoelectron spectroscopy (XPS)
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Zusammenfassung:The new definition of the kilogram based on the Planck constant was implemented in May 2019. The National Metrology Institute of Japan (NMIJ) will realize the new kilogram by the X-ray crystal density method using a 28 Si-enriched sphere. An international comparison of the realizations of the new kilogram by national metrology institutes was organized. As a participant in the comparison, the NMIJ realized the kilogram by the volume measurement and surface characterization of a 28 Si-enriched sphere. Details of the measurement results and the uncertainty evaluation of the realization are described. The comparison of the realization results with previous realization results in 2016 is also provided.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2021.3061805