Title :
Experimental determinations of the quantity M//spl rho/ for silicon single crystals used in the determination of the Avogadro constant
Author :
De Bievre, P. ; Valkiers, S. ; Peiser, S. ; Spieweck, F. ; Bettin, H. ; Peuto, A. ; Sacconi, A. ; Mosca, M. ; Fujii, K. ; Tanaka, M. ; Nezu, Y.
Author_Institution :
Inst. for Reference Mater. & Meas., Commission of the Eur. Communities, Geel, Belgium
fDate :
June 27 1994-July 1 1994
Abstract :
Considerable improvements in the measurements of the molar mass M(Si) of silicon crystals combined with high-accuracy densities (/spl rho/) of the same crystals, have yielded experimental M(Si)//spl rho/ values resulting from the PTB-IRMM, the IMGC-IRMM and the NRLM-IRMM projects for the redetermination of Avogadro´s Constant. These M(Si)//spl rho/ values are compared with attributed uncertainties, in relation to the supposition of constancy M(Si)//spl rho/ for silicon.<>
Keywords :
constants; density measurement; elemental semiconductors; molecular weight determination; silicon; Avogadro constant; IMGC-IRMM; NRLM-IRMM; PTB-IRMM; Si; Si crystals; molar mass; uncertainties; Atomic measurements; Crystals; Current measurement; Density measurement; Isotopes; Silicon; Temperature;
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.1994.333368
