Determination of the Boltzmann constantkfrom the speed of sound in helium gas at the triple point of water

Autor:	Laurent Pitre, Marc Himbert, F. Sparasci, Lara Risegari, P. A. Giuliano Albo, M.D. Plimmer
Rok vydání:	2015
Předmět:	Physics Triple point General Engineering Thermodynamics Ideal gas symbols.namesake Resonator Volume (thermodynamics) Speed of sound Boltzmann constant symbols Particle velocity Atomic physics Acoustic resonance
Zdroj:	Metrologia. 52:S263-S273
ISSN:	1681-7575 0026-1394
DOI:	10.1088/0026-1394/52/5/s263
Popis:	The Boltzmann constant k has been determined from a measurement of the speed of sound in helium gas in a quasi-spherical resonator (volume 0.5 l) maintained at a temperature close to the triple point of water (273.16 K). The acoustic velocity c is deduced from measured acoustic resonance frequencies and the dimensions of the quasi-sphere, the latter being obtained via simultaneous microwave resonance. Values of c are extrapolated to the zero pressure limit of ideal gas behaviour. We find J⋅K−1, a result consistent with previous measurements in our group and elsewhere. The value for k, which has a relative standard uncertainty of 1.02 ppm, lies 0.02 ppm below that of the CODATA 2010 adjustment.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d2a6ce5cb65321b4f7890d380622fbcc https://doi.org/10.1088/0026-1394/52/5/s263 Zobrazit plný text záznamu