On the molar mass of silicon for a new Avogadro constant

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DOIResolve DOI: http://doi.org/10.1109/CPEM.2012.6251010
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Proceedings title2012 Conference on Precision Electromagnetic Measurements (CPEM 2012)
Series titleCPEM Digest
Conference2012 Conference on Precision Electromagnetic Measurements (CPEM 2012), July 1-6, 2012, Washington, DC, USA
ISSN0589-1485
ISBN978-1-4673-0442-9
978-1-4673-0441-2
Pages476477; # of pages: 2
SubjectAvogadro constant; isotope dilution mass spectrometry; molar mass; multicollector ICP-mass spectrometry; silicon; uncertainty
AbstractAn overview of the present results and status of the molar mass of a silicon crystal highly enriched in ²⁸Si used for a new determination of the Avogadro constant is given with special emphasis on the cooperation between NIST, NRC, and PTB currently working on this topic. Using an experimental combination of multicollector ICP and isotope dilution mass spectrometry, a new approach developed by PTB for the measurement of the isotopic composition has been applied. It focuses on the isotope ratio treatment of ³°Si/²⁹Si mainly, avoiding the more uncertain measurement of ratios related to the main isotope ²⁸Si.
Publication date
PublisherIEEE
LanguageEnglish
AffiliationMeasurement Science and Standards; National Research Council Canada
Peer reviewedYes
NPARC number21269119
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Record identifier633fa62c-621a-4b2d-b0e7-d93adac19ff6
Record created2013-12-06
Record modified2016-05-09
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