### Codata Internationally Reconmmended 2022 Values of the Fundamental Physical Constants

May 8, 2024

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Displaying 1 - 25 of 176

May 8, 2024

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, , ,

January 10, 2022

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, , ,

We report the 2018 self-consistent values of constants and conversion factors of physics and chemistry recommended by the Committee on Data of the International Science Council (CODATA). The recommended values can also be found at physics.nist.gov

October 12, 2021

Author(s)

I M. Mills,

, T J. Quinn, ,
The International System of Units (SI) is founded on the seven base units metre, kilogram, second, ampere, kelvin, mole and candela corresponding to the seven base quantities length, mass, time, electric current, thermodynamic temperature, amount of

June 30, 2021

Author(s)

, , ,

We report the 2018 self-consistent values of constants and conversion factors of physics and chemistry recommended by the Committee on Data of the Interna- tional Science Council (CODATA). The recommended values can also be found at physics.nist.gov

February 10, 2021

Author(s)

,

June 3, 2019

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, , ,

January 29, 2018

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, , ,

Described in detail is the Committee on Data for Science and Technology (CODATA) special least- squares adjustment of the values of the fundamental constants carried out in the summer of 2017. Based on all relevant data available by 1 July 2017, its

November 7, 2017

Author(s)

,

The 1998 CODATA recommended values of the fundamental physical constants have been derived by P.J. Mohr and B.N. Taylor of the NIST Physics Laboratory under the auspices of the CODATA (Committee on Data on Science and Technology) Task Group on Fundamental

April 12, 2017

Author(s)

, ,

Wallet card of 2014 CODATA RECOMMENDED VALUES OF THE FUNDAMENTAL CONSTANTS OF PHYSICS AND CHEMISTRY, NIST SP-959 (Apr 2017)

December 20, 2016

Author(s)

, Sandra Knotts,

Plans are underway to redefine the International System of Units (SI) around 2018. The new SI specifies the values of certain physical constants to define units. This article explains the new SI in a way that could be used to present it to high-school

November 22, 2016

Author(s)

, ,

This paper gives the 2014 self-consistent set of values of the constants and conversion factors of physics and chemistry recommended by the Committee on Data for Science and Technology (CODATA). These values are based on a least-squares adjustment that

September 26, 2016

Author(s)

, ,

This paper gives the 2014 self-consistent set of values of the constants and conversion factors of physics and chemistry recommended by the Committee on Data for Science and Technology (CODATA). These values are based on a least-squares adjustment that

June 1, 2015

Author(s)

,

The International System of Units (SI) is supposed to be coherent. That is, when a combination of units is replaced by an equivalent unit, there is no additional numerical factor. Here we consider dimensionless units as defined in the SI, e.g. angular

July 1, 2014

Author(s)

,

Comparison of optical frequency measurements to predictions of quantum electrodynamics (QED) for Rydberg states of one-electron ions can test theory and allow new determinations of constants of nature to be made. Simplifications in the QED theory of high

April 28, 2014

Author(s)

, P Indelicatio, J. Sapirstein

The vacuum-polarization correction for bound electrons or muons is examined. The objective is to formulate a framework for calculating the correction from bound-state quantum electrodynamics entirely in coordinate space, including the Uehling potential

May 17, 2013

Author(s)

, J Griffith, J. Sapirstein

A bound-state field theory approach to muonic hydrogen is set up using a variant of the Furry representation in which the lowest-order Hamiltonian describes a muon in the presence of a point Coulomb field, but the origin of the binding field is taken to be

March 1, 2012

Author(s)

, ,

This paper give 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) for international use. The 2010 adjustment takes into

March 1, 2012

Author(s)

, ,

NIST SP 961 (Dec/2012)

December 1, 2011

Author(s)

, ,

The mission of the International Council for Science : Committee on Data for Science and Technology (CODATA ) is to strengthen international science for the benefit of society by promoting improved scientific and technical data management and use. One of

March 1, 2011

Author(s)

, Ian M. Mills, Terry Quinn, ,

We review the proposal of the International Committee for Weights and Measures (CIPM), currently being considered by the General Conference on Weights and Measures (CGPM), to revise the International System of Units, the SI. The proposal includes new

March 1, 2011

Author(s)

, M. Puchalski, Ulrich D. Jentschura

The correction to the polarizability of helium due to black-body radiation is calculated near room temperature. A precise theoretical determination of the black-body radiation correction to the polarizability of helium is essential for dielectric gas

March 1, 2011

Author(s)

Ulrich D. Jentschura, M. Puchalski,

The metrology of fundamental quantities in atomic physics has been crucial for a number of advanced determinations of fundamental constants. In addition to very accurate frequency measurements, the molar polarizability of atomic gases has recently been

April 1, 2010

Author(s)

,

This Resource Letter is a guide to the literature describing both experimental and theoretical work on the determination of values of certain fundamental physical constants. In this Letter, fundamental physical constants are taken to be the experimentally

March 19, 2010

Author(s)

Ulrich D. Jentschura,

,
The nature of the theory of circular Rydberg states of hydrogenlike ions allows highly-accurate predictions to be made for energy levels. In particular, uncertainties arising from the problematic nuclear size correction which beset low angular-momentum

November 26, 2009

Author(s)

Properties of six-component electromagnetic field solutions of a matrix form of the Maxwell equations, analogous to the four-component solutions of the Dirac equation, are described. It is shown that the six-component equation, including sources, is