Title :
The silicon-28 path to the Avogadro constant-first experiments and outlook
Author :
Seyfried, P. ; Spieweck, F. ; Bettin, H. ; Becker, P. ; Kuetgens, U. ; Stumpel, J. ; De Bievre, P. ; Valkiers, S. ; Zulehner, W. ; Holm, C.
Author_Institution :
Physikalisch Tech. Bundesanstalt, Braunschweig, Germany
fDate :
June 27 1994-July 1 1994
Abstract :
The first investigations of lattice parameter, density and molar mass of an enriched silicon 28 single crystal are reported. The unexpectedly large amount of impurity atoms in the material at present limits the goal of improving the uncertainty in a new determination of the Avogadro constant.<>
Keywords :
constants; lattice dynamics; silicon; /sup 28/ Si; Avogadro constant; Si; density; impurity atoms; lattice parameter; molar mass; single crystal; uncertainty; Atomic measurements; Boron; Crystalline materials; Crystals; Density measurement; Impurities; Lattices; Mass spectroscopy; Powders; Silicon;
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.1994.333372
