DocumentCode
2961835
Title
The determination of the Avogadro constant-not simply a metrological problem
Author
Becker, P.
Author_Institution
Phys. Tech. Bundesanstalt, Braunschweig, Germany
fYear
1998
fDate
6-10 July 1998
Firstpage
456
Abstract
Summary form only given, as follows. A new round in the determination of the Avogadro constant is under way at PTB and at other national metrological institutes as a step towards an alternative definition of the SI unit of mass. The required measurements of the relevant crystal data are currently hampered by an (unexpected and not yet total identified) imperfection of the crystal lattice.
Keywords
constants; density measurement; lattice constants; mass measurement; silicon; units (measurement); voids (solid); Avogadro constant determination; PTB comparison measurements; SI unit of mass; Si; alternative definition; crystal data measurements; density; interatomic distance; invariant quantity; kilogram realisation; lattice imperfection; lattice parameter; metrological problem; molar volume; vacancy concentration; voids; Atomic measurements; Crystals; Current measurement; Impurities; Microscopy; Prototypes; Temperature; Volume measurement;
fLanguage
English
Publisher
ieee
Conference_Titel
Precision Electromagnetic Measurements Digest, 1998 Conference on
Conference_Location
Washington, DC, USA
Print_ISBN
0-7803-5018-9
Type
conf
DOI
10.1109/CPEM.1998.700001
Filename
700001
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