# Data and analysis for the CODATA 2017 special fundamental constants adjustment

@article{Mohr2018DataAA,
title={Data and analysis for the CODATA 2017 special fundamental constants adjustment},
author={Peter J. Mohr and David B. Newell and Barry N. Taylor and Eite Tiesinga},
journal={Metrologia},
year={2018},
volume={55},
pages={125-146}
}
• Published 24 January 2018
• Physics
• Metrologia
The special least-squares adjustment of the values of the fundamental constants, carried out by the Committee on Data for Science and Technology (CODATA) in the summer of 2017, is described in detail. It is based on all relevant data available by 1 July 2017. The purpose of this adjustment is to determine the numerical values of the Planck constant h, elementary charge e, Boltzmann constant k, and Avogadro constant N A for the revised SI expected to be established by the 26th General Conference…
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## References

SHOWING 1-10 OF 50 REFERENCES
CODATA Recommended Values of the Fundamental Physical Constants: 2006
• Education
• 2005
This paper gives the 2010 self-consistent set of values of the basic constants and conversion factors of physics and chemistry recommended by the Committee on Data for Science and Technology (CODATA)
A determination of the Planck constant using the LNE Kibble balance in air
• Physics
• 2017
A determination of the Planck constant h using the LNE Kibble balance in air was carried out in the spring of 2017. Substantial improvements since 2014, chiefly related to the mass standard,
First determination of the Planck constant using the LNE watt balance
• Economics
• 2015
After separate developments of the different elements with continuous characterizations and improvements, the LNE watt balance has been assembled. This paper describes the system in detail and gives
A summary of the Planck constant determinations using the NRC Kibble balance
• Physics
• 2017
We present a summary of the Planck constant determinations using the NRC watt balance, now referred to as the NRC Kibble balance. The summary includes a reanalysis of the four determinations
A low-uncertainty measurement of the Boltzmann constant
• Chemistry, Physics
• 2013
The Comite international des poids et mesures (CIPM) has projected a major revision of the International System of Units (SI) in which all of the base units will be defined by fixing the values of
The AME2016 atomic mass evaluation (I). Evaluation of input data; and adjustment procedures
• Physics
• 2017
This paper is the first of two articles (Part I and Part II) that presents the results of the new atomic mass evaluation, AME2016. It includes complete information on the experimental input data
A Boltzmann Constant Determination Based on Johnson Noise Thermometry.
• Physics
Metrologia
• 2017
A value for the Boltzmann constant was measured electronically using an improved version of the Johnson Noise Thermometry (JNT) system at the National Institute of Standards and Technology (NIST), USA, with a relative standard uncertainty of 5.5%.
Re-estimation of argon isotope ratios leading to a revised estimate of the Boltzmann constant
• Geology
• 2017
In 2013, NPL, SUERC and Cranfield University published an estimate for the Boltzmann constant [1] based on a measurement of the limiting low-pressure speed of sound in argon gas. Subsequently, an
The first determination of the Planck constant with the joule balance NIM-2
• Physics
• 2017
The National Institute of Metrology (NIM, China) proposed a joule balance method to measure the Planck constant in 2006, and built the first prototype NIM-1 to verify its principle with a relative
Measurement of the Planck constant at the National Institute of Standards and Technology from 2015 to 2017
• Physics
• 2017
Researchers at the National Institute of Standards and Technology(NIST) have measured the value of the Planck constant to be $h =6.626\,069\,934(89)\times 10^{-34}\,$J$\,$s (relative standard