Measurements of volume and density of the new IMGC silicon standard [for Avogadro constant determination]

Author

Sacconi, A. ; Peuto, A. ; Panciera, R. ; Pasin, W. ; Pettorruso, S.

Author_Institution

Ist. di Metrol., CNR, Torino, Italy

fYear

2000

fDate

14-19 May 2000

Firstpage

119

Lastpage

120

Abstract

The IMGC has developed volume-density standards in the form of single-crystal silicon spheres within the project for the determination of the Avogadro constant. A new sphere of nearly perfect form is going to be available, made of high-purity and near-perfect silicon single-crystal. The absolute determination of its mass and volume is presented together with the expected improvements. The new standard will be then intercompared with similar artifacts within a joint international project coordinated through the WG on the Avogadro constant of the CCM.

Keywords

Constants; Density measurement; Measurement standards; Measurement uncertainty; Silicon; Weighing; Avogadro constant determination; Si; absolute determination; density measurement; high-purity near-perfect crystals; hydrostatic weighing comparison; mass measurement; molar volume measurement; single-crystal spheres; uncertainty; volume-density standards; Atomic measurements; Density measurement; Impurities; Measurement standards; Position measurement; Silicon; Size measurement; Standards development; Thickness measurement; Volume measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements Digest, 2000 Conference on

Conference_Location

Sydney, NSW, Australia

Print_ISBN

0-7803-5744-2

Type

conf

DOI

10.1109/CPEM.2000.850906

Filename

850906