AustralieFrV1, Main, Merge, bibRecord, 008523

Mass comparison of the 1kg silicon sphere AVO3 traceable to the International Prototype K

Identifieur interne : 008523 ( Main/Merge ); précédent : 008522; suivant : 008524

Mass comparison of the 1kg silicon sphere AVO3 traceable to the International Prototype K

Auteurs : A. Picard [France] ; N. Bignell [Australie] ; M. Borys [Allemagne] ; S. Downes [Royaume-Uni] ; S. Mizushima [Japon]

Source :

Metrologia [ 0026-1394 ] ; 2009.

RBID : ISTEX:2772EBBA900166E0FA177AFE759F8CB2B8E4DABD

Descripteurs français

Wicri :
- topic : Prototype.

English descriptors

Abstract

To determine a new value of the Avogadro constant with a relative combined standard uncertainty of 2 108, the mass determination of a 1kg 28Si sphere is crucial and should be determined with the highest level of accuracy. In the next two years the laboratories involved in the International Avogadro Project should be able to determine the mass of a 1kg silicon sphere under vacuum with a combined standard uncertainty within 5g. To obtain such a target it is essential to gain experience and to promote cooperation in mass measurement on silicon spheres among the laboratories involved. For this purpose an international comparison has been performed to evaluate the weighing procedure and to reveal the difficulties encountered in the mass determination of a silicon sphere.This particular comparison, which is the first international mass comparison under vacuum conditions, has demonstrated that the reference value for the mass of a 1kg silicon sphere can be determined traceable to the International Prototype with a standard uncertainty of 4.0g.

Url:

https://api.istex.fr/document/2772EBBA900166E0FA177AFE759F8CB2B8E4DABD/fulltext/pdf

DOI: 10.1088/0026-1394/46/1/001

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ISTEX:2772EBBA900166E0FA177AFE759F8CB2B8E4DABD

Le document en format XML

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<front><div type="abstract">To determine a new value of the Avogadro constant with a relative combined standard uncertainty of 2 108, the mass determination of a 1kg 28Si sphere is crucial and should be determined with the highest level of accuracy. In the next two years the laboratories involved in the International Avogadro Project should be able to determine the mass of a 1kg silicon sphere under vacuum with a combined standard uncertainty within 5g. To obtain such a target it is essential to gain experience and to promote cooperation in mass measurement on silicon spheres among the laboratories involved. For this purpose an international comparison has been performed to evaluate the weighing procedure and to reveal the difficulties encountered in the mass determination of a silicon sphere.This particular comparison, which is the first international mass comparison under vacuum conditions, has demonstrated that the reference value for the mass of a 1kg silicon sphere can be determined traceable to the International Prototype with a standard uncertainty of 4.0g.</div>
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Mass comparison of the 1kg silicon sphere AVO3 traceable to the International Prototype K

Mass comparison of the 1kg silicon sphere AVO3 traceable to the International Prototype K

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri