Title :
The IMGC volume-density standards for the Avogadro constant
Author :
Sacconi, A. ; Peuto, A. ; Mosca, M. ; Panciera, R. ; Pasin, W. ; Pettorruso, S.
Author_Institution :
Istituto di Metrol. G. Colonnetti, Torino, Italy
fDate :
June 27 1994-July 1 1994
Abstract :
Within the project for the determination of the Avogadro constant, the IMGC has developed volume-density standards in the form of single-crystal silicon spheres. In addition to a first sphere previously characterised and intercompared with a similar artifact, a new sphere of nearly perfect form is now available. The absolute determination of its mass and volume is presented together with the expected improvements in the assignment of a density value to high-purity and near-perfect silicon single-crystals.<>
Keywords :
constants; density measurement; density of solids; elemental semiconductors; measurement standards; silicon; volume measurement; Avogadro constant; IMGC volume-density standards; Si; Si single-crystal spheres; hydrostatic comparisons; mass measurement; volume measurement; Atomic measurements; Computer errors; Density measurement; Impurities; Lattices; Physics; Silicon; Standards development; Testing; Volume measurement;
Conference_Titel :
Precision Electromagnetic Measurements, 1994. Digest., 1994 Conference on
Conference_Location :
Boulder, CO, USA
Print_ISBN :
0-7803-1984-2
DOI :
10.1109/CPEM.1994.333194
