skip to main content

SciTech ConnectSciTech Connect

Title: The Correlation of the N{sub A} Measurements by Counting {sup 28}Si Atoms

An additional value of the Avogadro constant was obtained by counting the atoms in isotopically enriched Si spheres. With respect to the previous determination, the spheres were etched and repolished to eliminate metal contaminations and to improve the roundness. In addition, all the input quantities—molar mass, lattice parameter, mass, and volume—were remeasured aiming at a smaller uncertainty. In order to make the values given in Andreas et al. [Metrologia 48, S1 (2011)] and Azuma et al. [Metrologia 52, 360 (2015)] usable for a least squares adjustment, we report about the estimate of their correlation.
Authors:
; ;  [1] ;  [2] ; ; ; ;  [3] ; ; ; ;  [4]
  1. INRIM—Istituto Nazionale di Ricerca Metrologica, Str. delle Cacce 91, 10135 Torino (Italy)
  2. BIPM—Bureau International des Poids et Mesures BIPM, Pavillon de Breteuil, 92312 Sèvres Cedex (France)
  3. NMIJ—National Metrology Institute of Japan, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8563 (Japan)
  4. PTB—Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig (Germany)
Publication Date:
OSTI Identifier:
22493964
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Physical and Chemical Reference Data; Journal Volume: 44; Journal Issue: 3; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ATOMS; CORRELATIONS; LATTICE PARAMETERS; LEAST SQUARE FIT; MASS; METALS; SILICON; SILICON 28