Comptes Rendus
no. 9
Optimizing acoustic measurements of the Boltzmann constant
[Progrès dans la détermination de la constante de Bolzmann par voie acoustique]
Michael R. Moldover1
1 National Institute of Standards and Technology, Gaithersburg, MD 20899-8360, USA
Comptes Rendus. Physique, Volume 10 (2009) no. 9, pp. 815-827.

L'article récapitule les avancées effectuées en métrologie acoustique dans les gaz depuis la mesure de la constante universelle des gaz R effectuée en 1988 en utilisant un résonateur acoustique sphérique. Des progrès substantiels ont été réalisés, tant pour mieux comprendre le fonctionnement des résonateurs acoustiques que pour calculer ab initio, avec une fiabilité accrue, les caractéristiques thermo-physiques de l'hélium. Ils permettent d'envisager désormais une détermination de la constante de Boltzmann kB par voie acoustique avec une incertitude relative meilleure que 10−6, en utilisant soit l'argon, soit l'hélium.

We review the progress in acoustic metrology of gases that has occurred since the 1988 measurement of the universal gas constant R using a spherical acoustic resonator. The advances in understanding resonators and in calculating the thermophysical properties of helium ab initio suggest that today one could determine Boltzmann's constant kB from acoustic measurements using either helium or argon with a relative uncertainty less than 10−6.

Publié le :
DOI : 10.1016/j.crhy.2009.10.007
Michael R. Moldover 1

1 National Institute of Standards and Technology, Gaithersburg, MD 20899-8360, USA 
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Michael R. Moldover. Optimizing acoustic measurements of the Boltzmann constant. Comptes Rendus. Physique, Volume 10 (2009) no. 9, pp. 815-827. doi : 10.1016/j.crhy.2009.10.007. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2009.10.007/

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