Title :
Density Comparison of Isotopically Purified Silicon Single Crystals by the Pressure-of-Flotation Method
Author :
Waseda, Atsushi ; Fujii, Kenichi
Author_Institution :
Nat. Metrol. Inst. of Japan, Nat. Inst. of Adv. Ind. Sci. & Technol., Tsukuba, Japan
fDate :
7/1/2011 12:00:00 AM
Abstract :
An isotopically purified silicon crystal has recently been synthesized to enable the Avogadro constant to be determined more accurately. To perform new density comparison measurement by the pressure-of-flotation method, the effective compressibility of a liquid is reevaluated. Density comparison measurement is performed for purified 28Si crystals, and the relative density difference of Avo28-S5 and Avo28-S8 28Si spheres is evaluated.
Keywords :
compressibility; constants; density measurement; elemental semiconductors; silicon; 28Si; Avogadro constant; compressibility; density comparison measurement; isotopically purified silicon single crystals; pressure-of-flotation method; Crystals; Density measurement; Optical variables measurement; Pressure measurement; Silicon; Temperature measurement; Uncertainty; Avogadro constant; density measurement; pressure-of-flotation (PF); silicon;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2011.2114070
