Title: Acoustic Resonator Experiments at the Triple Point of Water: First Results for the Boltzmann Constant and Remaining Challenges
Authors: SUTTON GavinUNDERWOOD RobinPITRE LaurentDE PODESTA MichaelVALKIERS Staf
Citation: INTERNATIONAL JOURNAL OF THERMOPHYSICS vol. 31 no. 7 p. 1310-1346
Publisher: SPRINGER/PLENUM PUBLISHERS
Publication Year: 2010
JRC N°: JRC55543
ISSN: 0195-928X
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC55543
DOI: 10.1007/s10765-010-0722-z
Type: Articles in periodicals and books
Abstract: We report on two sets of isothermal acoustic measurements made with argon close to the triple point of water using a 50mm radius, thin-walled, diamond-turned quasisphere. Our two isotherms yielded values for the Boltzmann constant, kB, which differ by 0.9 parts in 106, and have an average value of kB = (1.380 649 6 ± 0.000 004 3)×10-23J · K-1. The relative uncertainty is 3.1 parts in 106, and the average value is 0.58 parts in 106 below the 2006 CODATA value (Mohr et al. Rev Mod Phys 80:633, 2008), and so the values are consistent within their combined (k = 1) uncertainties.
JRC Directorate:Health, Consumers and Reference Materials

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