Accurate measurements of the Avogadro and Planck constants by counting silicon atoms
Identifieur interne : 002706 ( Istex/Corpus ); précédent : 002705; suivant : 002707Accurate measurements of the Avogadro and Planck constants by counting silicon atoms
Auteurs : Horst Bettin ; Kenichi Fujii ; John Man ; Giovanni Mana ; Enrico Massa ; Alain PicardSource :
- Annalen der Physik [ 0003-3804 ] ; 2013-09.
English descriptors
- KwdEn :
- Accurate measurements, Atomic masses, Avogadro, Bettin, Compton frequency, Conversion factor, Elementary charge, Energy units, Fundamental constants, Gmbh, Ground state, Interferometer, Interferometer arms, International prototype, International system, Isotope, Isotopic composition, Kgaa, Kilogram, Lattice, Lattice parameter, Lattice parameter measurement, Macroscopic masses, Mana, Mass defect, Massa, Measurement equation, Measurement equations, Measurement uncertainty, Measurement units, Metrologia, Metrology, Minority isotopes, Molar, Molar mass, Nuclear physics, Numerical value, Nuovo cimento, Optical interferometry, Original paper, Oxide layer, Phys, Planck, Planck constants, Plane wave, Possible weaknesses, Precision measurements, Prototype, Quantum mechanics, Relative accuracy, Relative uncertainty, Roundness errors, Silicon, Silicon crystal, Silicon surfaces, Solid state physics, Sphere surface, Standard uncertainty, Surface stress, Unit cell volumes, Utmost interest, Vacancy concentration, Vacancy mode, Verlag, Verlag gmbh, Watt balance experiment, Watt balance experiments, Wavefront, Weinheim.
- Teeft :
- Accurate measurements, Atomic masses, Avogadro, Bettin, Compton frequency, Conversion factor, Elementary charge, Energy units, Fundamental constants, Gmbh, Ground state, Interferometer, Interferometer arms, International prototype, International system, Isotope, Isotopic composition, Kgaa, Kilogram, Lattice, Lattice parameter, Lattice parameter measurement, Macroscopic masses, Mana, Mass defect, Massa, Measurement equation, Measurement equations, Measurement uncertainty, Measurement units, Metrologia, Metrology, Minority isotopes, Molar, Molar mass, Nuclear physics, Numerical value, Nuovo cimento, Optical interferometry, Original paper, Oxide layer, Phys, Planck, Planck constants, Plane wave, Possible weaknesses, Precision measurements, Prototype, Quantum mechanics, Relative accuracy, Relative uncertainty, Roundness errors, Silicon, Silicon crystal, Silicon surfaces, Solid state physics, Sphere surface, Standard uncertainty, Surface stress, Unit cell volumes, Utmost interest, Vacancy concentration, Vacancy mode, Verlag, Verlag gmbh, Watt balance experiment, Watt balance experiments, Wavefront, Weinheim.
Abstract
Fundamental constants link seemingly different fields of physics and seemingly different quantities and measurement units. Consequently, they are of the utmost interest in metrology and it has been planned to redefine the kilogram by fixing the numerical value of the Planck constant. This paper summarises the methods to measure the ratio between the Planck constant and a mass and reviews the determination of the Avogadro constant by counting the atoms in a silicon crystal highly enriched by the 28Si isotope.
Url:
DOI: 10.1002/andp.201300038
Links to Exploration step
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