Direct determination of the Boltzmann constant by an optical method

被引：114

作者：

Daussy, C. ^{[1
]}

Guinet, M. ^{[1
]}

Amy-Klein, A. ^{[1
]}

Djerroud, K. ^{[1
]}

Hermier, Y. ^{[1
]}

Briaudeau, S. ^{[1
]}

Borde, Ch. J. ^{[1
]}

Chardonnet, C. ^{[1
]}

机构：

[1] Univ Paris 13, Phys Lasers Lab, CNRS, Inst Galilee,UMR 7538, F-93430 Villetaneuse, France

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.98.250801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have recorded the Doppler profile of a well-isolated rovibrational line in the nu(2) band of (NH3)-N-14. Ammonia gas was placed in an absorption cell thermalized by a water-ice bath. By extrapolating to zero pressure, we have deduced the Doppler width which gives a first measurement of the Boltzmann constant k(B) by laser spectroscopy. A relative uncertainty of 2x10(-4) has been obtained. The present determination should be significantly improved in the near future and contribute to a new definition of the kelvin.

引用

页数：4

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