Title :
Density of a single crystal natural silicon sphere
Author :
Giardini, W. ; Manson, P. ; Wouters, M. ; Warrington, B. ; Ward, B. ; Walsh, C. ; Jaatinen, E. ; Kenny, M.
Author_Institution :
Nat. Meas. Inst., Lindfield, NSW, Australia
Abstract :
The density of the single crystal natural silicon sphere Avo#3 has been re-determined at the National Measurement Institute, Australia (NMIA) as part of an international collaboration to determine the value of the Avogadro constant. A systematic review of the measurement system found a significant bias was introduced by the response of the laser to frequency steps during phase-shifting interferometry, which was characterized and corrected for. The density reported is based on new and re-calculated measurements taken between April 2000 and May 2006 during the ongoing development of the measurement system.
Keywords :
density measurement; elemental semiconductors; measurement systems; phase shifting interferometry; silicon; Si; density; frequency steps; laser response; measurement system; phase-shifting interferometry; single crystal natural silicon sphere; Atomic measurements; Australia; Density measurement; Frequency measurement; International collaboration; Laser stability; Measurement uncertainty; Phase shifting interferometry; Silicon; Temperature;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2008. CPEM 2008. Conference on
Conference_Location :
Broomfield, CO
Print_ISBN :
978-1-4244-2399-6
Electronic_ISBN :
978-1-4244-2400-9
DOI :
10.1109/CPEM.2008.4574956
