# 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} }

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…

## Figures and Tables from this paper

## 101 Citations

The CODATA 2017 Special Adjustment for the Revision of the SI

- Computer Science2018 Conference on Precision Electromagnetic Measurements (CPEM 2018)
- 2018

The exact values of the Planck constant h, elementary charge e, Boltzmann constant k, and Avogadro constant NA are presented and recommended to form the foundation of the revised SI.

The CODATA 2017 values of h, e, k, and N A for the revision of the SI

- Education
- 2018

Sufficient progress towards redefining the International System of Units (SI) in terms of exact values of fundamental constants has been achieved. Exact values of the Planck constant h, elementary…

Maintaining consensus for the redefined kilogram

- PhysicsMetrologia
- 2018

According to the 2013 recommendation of the Consultative Committee for Mass and Related Quantities (CCM), the upcoming redefinition of the kilogram based on the value of the Planck constant specifies…

The Planck Constant for the Definition and Realization of the Kilogram

- PhysicsAnnalen der Physik
- 2018

On May 20, 2019 the values of the Planck, h, and Avogadro, NA, constants will be fixed, revising our measurement system, the International System of Units (SI), and providing a new way to get mass…

Adjustment of fundamental physical constant values using the interval fusion with preference aggregation

- Economics
- 2020

The Planck-Balance—using a fixed value of the Planck constant to calibrate E1/E2-weights

- Physics
- 2018

A balance is proposed, which allows the calibration of weights in a continuous range from 1 mg to 1 kg using a fixed value of the Planck constant, h. This so-called Planck-Balance (PB) uses the…

Understanding the Revised SI: Background, Consequences, and Perspectives

- EconomicsAnnalen der Physik
- 2019

This article expounds the significance of the revision of the international system of units, the SI, approved by the General Conference on Weights and Measures (CGPM) in 2018. The revised SI…

Quantity Calculus, Fundamental Constants, and SI Units

- PhysicsJournal of Research of the National Institute of Standards and Technology
- 2018

A revised International System of Units (SI) is expected to be established by the
26th General Conference on Weights and Measures when it convenes in November 2018 and to
be put into practice…

Usage of Silicon Crystals to Determine the Avogadro and Planck Constants

- Materials Science2018 Conference on Precision Electromagnetic Measurements (CPEM 2018)
- 2018

Crystals produced from silicon that is highly enriched in the28Si isotope were used to determine the Avogadro constant by means of the X-ray crystal density (XRCD) method. The results were included…

The Revision of the SI – Towards an International System of Units Based on Defining Constants

- Physics
- 2018

Following many years of intense investigations, leading to significant progress with the determination of fundamental constants, it is now likely that the General Conference for Weights and Measures…

## 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.

- PhysicsMetrologia
- 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…