# Determination of the Avogadro constant by counting the atoms in a 28Si crystal.

@article{Andreas2011DeterminationOT, title={Determination of the Avogadro constant by counting the atoms in a 28Si crystal.}, author={B. Andreas and Y. Azuma and G. Bartl and P. Becker and H. Bettin and M. Borys and I. Busch and M. Gray and Philipp Fuchs and K. Fujii and H. Fujimoto and E. Kessler and M. Krumrey and U. Kuetgens and N. Kuramoto and G. Mana and P. Manson and E. Massa and S. Mizushima and A. Nicolaus and A. Picard and A. Pramann and O. Rienitz and D. Schiel and S. Valkiers and A. Waseda}, journal={Physical review letters}, year={2011}, volume={106 3}, pages={ 030801 } }

The Avogadro constant links the atomic and the macroscopic properties of matter. Since the molar Planck constant is well known via the measurement of the Rydberg constant, it is also closely related to the Planck constant. In addition, its accurate determination is of paramount importance for a definition of the kilogram in terms of a fundamental constant. We describe a new approach for its determination by counting the atoms in 1 kg single-crystal spheres, which are highly enriched with the… CONTINUE READING

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