Determinations of the Boltzmann constant
| Autor: | Laurent Pitre, M.D. Plimmer, Marc Himbert, F. Sparasci |
|---|---|
| Přispěvatelé: | Conservatoire National des Arts et Métiers [CNAM] (CNAM) |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Constante de Boltzmann General Engineering Energy Engineering and Power Technology Système international d'unités Johnson–Nyquist noise Dielectric Thermométrie primaire Wake Molecular spectroscopy 01 natural sciences [PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph] Computational physics 010309 optics symbols.namesake Ab initio quantum chemistry methods 0103 physical sciences Boltzmann constant symbols Primary thermometry International System of Units (SI) 010306 general physics Doppler effect Value (mathematics) |
| Zdroj: | Comptes Rendus Physique Comptes Rendus Physique, 2019, 20, pp.129-139. ⟨10.1016/j.crhy.2018.11.007⟩ |
| ISSN: | 1631-0705 |
| Popis: | We review measurements of the Boltzmann constant, k, the value of which is soon to be fixed at exactly 1.380 649 × 10 − 23 J⋅K−1 for the future revised Systeme international of units. In addition to a description of the theoretical background and of diverse experimental techniques (acoustic thermometry, Johnson noise thermometry, dielectric constant gas thermometry, and Doppler broadened molecular spectroscopy), the article highlights the decisive role of ab initio calculations of the thermophysical properties of gases, especially helium-4. Perspectives for improvements in thermometry are outlined in the wake of the new definition. |
| Databáze: | OpenAIRE |
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