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 Si-28 isotope.

Accurate measurements of the Avogadro and Planck constants by counting silicon atoms / Bettin, H; Fujii, K; Man, J; Mana, Giovanni; Massa, Enrico; Picard, A.. - In: ANNALEN DER PHYSIK. - ISSN 0003-3804. - 525:8-9(2013), pp. 680-687. [10.1002/andp.201300038]

Accurate measurements of the Avogadro and Planck constants by counting silicon atoms

MANA, GIOVANNI;MASSA, ENRICO;
2013

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 Si-28 isotope.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11696/33423
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 20
  • ???jsp.display-item.citation.isi??? 16
social impact