Avogadro and Planck Constants, Two Pillars of the International System of Units

Autor:	Enrico Massa
Jazyk:	angličtina
Rok vydání:	2024
Předmět:	International System of Units (SI) fundamental constants kilogram Kibble balance XRCD method Physics QC1-999
Zdroj:	Physics, Vol 6, Iss 2, Pp 845-858 (2024)
Druh dokumentu:	article
ISSN:	2624-8174
DOI:	10.3390/physics6020052
Popis:	The International System of Units (SI), the current form of the metric system and the world’s most used system of units, has been continuously updated and refined since the Metre Convention of 1875 to ensure that it remains up to date with the latest scientific and technological advances. The General Conference on Weights and Measures, at its 26th meeting in 2018, decided to adopt stipulated values of seven physical constants linked to seven measurement units (the second, meter, kilogram, ampere, kelvin, mole, and candela). This paper reviews the technologies developed, in intense and long-standing work, to determine the Avogadro and Planck constants, which are now integral to realising the kilogram.
Databáze:	Directory of Open Access Journals
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