A determination of the Boltzmann constant from speed of sound measurements in helium at a single thermodynamic state

We report on acoustic and microwave measurements made with a purified helium sample maintained close to a single thermodynamic state (... ~ 273.16 K, ... ~ 410 kPa) within a 2.1 L volume stainless steel spherical cavity. From these measurements and ab initio calculations of the non-ideality and the...

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Bibliographic Details
Published in:Metrologia 2010-08, Vol.47 (4), p.387-409
Main Authors: Gavioso, R M, Benedetto, G, Albo, P A Giuliano, Ripa, D Madonna, Merlone, A, Guianvarc'h, C, Moro, F, Cuccaro, R
Format: Article
Language:English
Subjects:
Helium
Holes
Mathematical analysis
Metrology
Microwaves
Physics
Refractive index
Refractivity
Stainless steel
Surface acoustic waves
Thermodynamics
Uncertainty
Velocity
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Summary:We report on acoustic and microwave measurements made with a purified helium sample maintained close to a single thermodynamic state (... ~ 273.16 K, ... ~ 410 kPa) within a 2.1 L volume stainless steel spherical cavity. From these measurements and ab initio calculations of the non-ideality and the refractive index of helium, we determine a value for the Boltzmann constant ... which is consistent with the recommended 2006 CODATA value: ... = (...7.5 ± 7.5) x 10... We discuss the current limits of the experiment and the prospects of a further reduction in the uncertainty associated with the determination of ... (ProQuest: ... denotes formulae/symbols omitted.)
ISSN:0026-1394
1681-7575
DOI:10.1088/0026-1394/47/4/005