Volume determination of the Avogadro spheres of highly enriched 28 Si with a spherical Fizeau interferometer

@inproceedings{Bartl2012VolumeDO,
  title={Volume determination of the Avogadro spheres of highly enriched 28 Si with a spherical Fizeau interferometer},
  author={Guido Bartl and Horst Bettin and Michael Krystek and Torsten Mai and Arnold Nicolaus and Andreas Peter},
  year={2012}
}
Within the scope of the efforts concerning the redefinition of the SI base unit “kg” the final results of the international research project aiming at the redetermination of the Avogadro constant are ready to be announced. Among other quantities the volume of two spheres which are made of a highly enriched Si single crystal had to be determined. For this purpose a special Fizeau interferometer for the measurement of the spheres’ diameters has been developed at PTB. This paper reports the final… CONTINUE READING
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