Precision volume measurements on silicon spheres

• Published in: Proceedings of 20th Biennial Conference on Precision Electromagnetic Measurements pp. 476 - 477
• Main Authors: Sacconi, A., Panciera, R., Pasin, W.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 1996
• Subjects: Density measurement; Gain measurement; Instruments; Lattices; Length measurement; Measurement standards; Silicon; Temperature; Thermal expansion; Volume measurement

In the determination of the Avogadro constant N/sub A/, use is made of silicon spheres as volume-density standards, where volume measurements play a critical role. The experience gained at the IMGC is reviewed and new data are presented on the reproducibility of the results together with some prelim...