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Accurate measurements of the Avogadro and Planck constants by counting silicon atoms

Identifieur interne : 002706 ( Istex/Corpus ); précédent : 002705; suivant : 002707

Accurate measurements of the Avogadro and Planck constants by counting silicon atoms

Auteurs : Horst Bettin ; Kenichi Fujii ; John Man ; Giovanni Mana ; Enrico Massa ; Alain Picard

Source :

RBID : ISTEX:D0FE8D162ADCECD98BF2E1770F5FA9F8C788FEB0

English descriptors

Abstract

Fundamental constants link seemingly different fields of physics and seemingly different quantities and measurement units. Consequently, they are of the utmost interest in metrology and it has been planned to redefine the kilogram by fixing the numerical value of the Planck constant. This paper summarises the methods to measure the ratio between the Planck constant and a mass and reviews the determination of the Avogadro constant by counting the atoms in a silicon crystal highly enriched by the 28Si isotope.

Url:
DOI: 10.1002/andp.201300038

Links to Exploration step

ISTEX:D0FE8D162ADCECD98BF2E1770F5FA9F8C788FEB0

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