Journal
METROLOGIA
Volume 50, Issue 6, Pages 623-630Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0026-1394/50/6/623
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Funding
- CNRS
- Laboratoire National de Metrologie et d'Essais
- European Community (EraNet/IMERA)
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We report on our on-going effort to measure the Boltzmann constant, k(B), using the Doppler broadening technique. The main systematic effects affecting the measurement are discussed. A revised error budget is presented in which the global uncertainty on systematic effects is reduced to 2.3 ppm. This corresponds to a reduction of more than one order of magnitude compared with our previous Boltzmann constant measurement. Means to reach a determination of k(B) at the part per million accuracy level are outlined.
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