Volume of Quasi-spherical Solid Density Standards

  title={Volume of Quasi-spherical Solid Density Standards},
  author={Giovanni Mana},
In Bragg's approach to the determination of the Avogadro constant, the measurement of silicon density as the ratio of mass to volume is an essential step. With a view to achieving a relative uncertainty of 10-7 in the determination of NA, the computation of the volumes of solid density standards manufactured in the form of optically-polished silicon balls was investigated. Apart from a negligible difference, the volume considered is that of a sphere having the same average diameter. The… CONTINUE READING


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