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Title: Dependence of the triple point temperature of neon on isotopic composition and its implications for the ITS-90

The paper summarizes the results of an International Project started in 2003 aimed at formulating a correction for the variability of isotopic composition found in 'natural' neon, and presently not taken into account by the ITS-90 definition, whose consequent ambiguity leads to a combined uncertainty u{sub c}= 160 μK, whereas u{sub c}= 30-50 μK for the rest of the budget. After a very short summary of the Project results (a detailed Final Report will be published later) recommendations for the correction function are presented, in agreement with both the experimental data and the theoretical calculations.
Authors:
;  [1] ;  [2] ; ;  [3] ;  [4] ; ;  [5] ;  [6] ; ;  [7] ; ;  [8] ;  [9] ;  [10]
  1. Istituto Nazionale di Ricerca Metrologica (INRIM), Strada delle cacce 73, 10135 Torino (Italy)
  2. Laboratoire Commun de Métrologie LNE-Cnam (LCM), La Plaine Saint-Denis (France)
  3. National Research Council (NRC), Ottawa (Canada)
  4. Korean Research Institute of Standards (KRISS), Yusong, Daejeon (Korea, Republic of)
  5. Instytut Niskich Temperatur i Badan Strukturalnych (INTiBS), Wroclaw (Poland)
  6. Geochemical Research Center, Graduate School of Science, University of Tokyo, Tokyo (Japan)
  7. National Metrology Institute of Japan (NMIJ), AIST, Tsukuba (Japan)
  8. Van Swinden Laboratorium (VSL), Leiden (Netherlands)
  9. National Institute of Standards and Technology (NIST), Gaithersburg (United States)
  10. Institute of Reference Materials and Measurements (IRMM), EU-JRC, Geel (Belgium)
Publication Date:
OSTI Identifier:
22224146
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1552; Journal Issue: 1; Conference: 9. international temperature symposium, Los Angeles, CA (United States), 19-23 Mar 2012; Other Information: (c) 2013 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; CORRECTIONS; ISOTOPE RATIO; NEON; TEMPERATURE MEASUREMENT; TRIPLE POINT