Title :
A more accurate value for the Avogadro constant
Author :
De Bievre, P. ; Valkiers, S. ; Becker, P. ; Ludicke, F. ; Spieweck, F. ; Stumpel, J.
Author_Institution :
Inst. for Reference Mater. & Meas., Eur. Commission, Geel, Belgium
fDate :
June 27 1994-July 1 1994
Abstract :
Significant improvements in the method to determine the absolute molar mass of silicon have been achieved and are reported. They enable one to reduce the uncertainty contribution of the molar mass to the uncertainty of a previously published Avogadro constant N/sub A/. The new value for N/sub A/ and its reduced uncertainty is reported.<>
Keywords :
constants; density measurement; density of solids; elemental semiconductors; isotope detection; isotope relative abundance; measurement errors; silicon; Avogadro constant; Si; Si isotopes; absolute molar mass; isotopic composition; measurement errors; uncertainty; Chemical processes; Crystals; Ion sources; Isotopes; Mass spectroscopy; Mechanical variables measurement; Pressure measurement; Silicon; Uncertainty; Vacuum systems;
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.1994.333195
