| Zugriffsnummer | 23161 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | ohne Peer Review |
| Sprache | Englisch |
| Titel | The marathon race to a new atomic kilogram |
| Autor(in); Institution |
Becker, Peter; 4.3, Quantenoptik und Längeneinheit, PTB-Braunschweig
Nicolaus, Arnold; 5.4, Interferometrie an Maßverkörperungen, PTB-Braunschweig
|
| Quelle/Jahr | Europhysics News: 40 (2009), 1, 23 - 26 |
| ISSN | 0531-7479 (PRINT) ; 1432-1092 (ONLINE) |
| DOI | |
| Verlag | Les Ulis: EDP Sciences |
| Freie Schlagworte | Avogadro constant ; single-crystal silicon ; sphere interferometer |
| Zusammenfassung | Almost all of the base units of the International System of Units (SI) have meanwhile been defined by atomic constants or fundamental constants of physics. Only the kilogram is still represented by a prototype, the prototype kilogram. Experiments to also link the kilogram to fundamental constants have advanced an important step. The so-called Avogadro experiment determines mass and volume of a single-crystal sphere of isotopical enriched silicon which molar mass and lattice constant is also to be determined. |
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