Primary gas thermometry by means of laser absorption spectroscopy: Determination of the Boltzmann constant
| Autor: | Andrea Merlone, Daniela di Serafino, Richard Wehr, Antonio Castrillo, Livio Gianfrani, P. Laporta, G. Casa, Gianluca Galzerano |
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| Přispěvatelé: | Casa, G., Castrillo, A., Galzerano, G., Wehr, R., Merlone, A., di Serafino, D., Laporta, P., Gianfrani, L., Casa, Giovanni, Castrillo, Antonio, DI SERAFINO, Daniela, Gianfrani, Livio |
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Materials science
Absorption spectroscopy Statistical Mechanics (cond-mat.stat-mech) Triple point Thermodynamic equilibrium General Physics and Astronomy FOS: Physical sciences doppler effect molecular spectra fundamental metrology Doppler effect — Molecular spectra — Fundamental metrology — symbols.namesake Boltzmann constant Melting point symbols Physical chemistry Atomic physics Spectroscopy Doppler effect Astrophysics::Galaxy Astrophysics Condensed Matter - Statistical Mechanics Doppler broadening |
| Zdroj: | Physical review letters info:cnr-pdr/source/autori:G. Casa, A. Castrillo, G. Galzerano, R. Wehr, A. Merlone, D. Di Serafino, P. Laporta, and L. Gianfrani/titolo:Primary gas thermometry by means of laser absorption spectroscopy: Determination of the Boltzmann constant/doi:10.1103%2FPhysRevLett.100.200801/rivista:Physical review letters (Print)/anno:2008/pagina_da:200801/pagina_a:1-4/intervallo_pagine:200801–1-4/volume:100 |
| DOI: | 10.1103/PhysRevLett.100.200801 |
| Popis: | We report on a new optical implementation of primary gas thermometry based on laser absorption spectrometry in the near infrared. The method consists in retrieving the Doppler broadening from highly accurate observations of the line shape of the R(12) $\nu_{1} + 2 \nu_{2}^{\phantom{1}0} + \nu_{3}$ transition in CO$_{2}$ gas at thermodynamic equilibrium. Doppler width measurements as a function of gas temperature, ranging between the triple point of water and the gallium melting point, allowed for a spectroscopic determination of the Boltzmann constant with a relative accuracy of $\sim1.6\times10^{-4}$. Comment: Submitted to Physical Review Letters |
| Databáze: | OpenAIRE |
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