科研之友
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摘要
In this paper, we present accurate measurements of the fundamental Boltzmann constant based on a line-shape analysis of acetylene spectra in the v(1) + v(3) band recorded using a tunable diode laser. Experimental spectra recorded at low pressures (0.25 - 9 Torr), have been analyzed using a Speed Dependent Voigt model that takes into account the molecular speed dependence effects. This line-shape model reproduces the experimental data with good accuracy and allows us to determine precise line-shape parameters for the P(25) transition of the v(1) + v(3) band. From the recorded spectra we obtained the Doppler-width and then determined the Boltzmann constant, k(B).
- 出版日期2014-12-7
