Primary gas thermometry by means of laser-absorption spectroscopy: Determination of the Boltzmann constant

被引：78

作者：

Casa, G. ^{[1
]}

Castrillo, A. ^{[1
]}

Galzerano, G. ^{[1
]}

Wehr, R. ^{[1
]}

Merlone, A. ^{[1
]}

Di Serafino, D. ^{[1
]}

Laporta, P. ^{[1
]}

Gianfrani, L. ^{[1
]}

机构：

[1] Univ Naples 2, Dipartimento Sci Ambientali, I-81100 Caserta, Italy

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.100.200801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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(0)(2)+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 similar to 1.6x10(-4).

引用

页数：4

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