| Zugriffsnummer | 15480 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Volume of the Avogadro sphere: diameter determination with the sphere interferometer |
| Autor(in); Institution |
Nicolaus, Arnold; 5.13, Interferentielle Längenmessung, PTB-Braunschweig
Bönsch, Gerhard; 5.13, Interferentielle Längenmessung, PTB-Braunschweig
|
| Quelle/Jahr | Conference digest : 2002 Conference on Precision Electromagnetic Measurements:(2002), 296 - 297 |
| ISBN | 0-7803-7242-5 |
| Verlag | Piscataway, NJ: IEEE |
| Konferenzangaben | Conference on Precision Electromagnetic Measurements ; CPEM 2002, Ottawa, 16-21, June, 2002, Canada |
| Zusammenfassung | For the new determination of Avogadro's constant, NA, one part of the measuring task consists in the high accuracy determination of the volume of a silicon sphere with a mass of 1 kg and a diameter of about 90 mm. An interferometer with spherical reference surfaces has been designed for this specific purpose. Measuring principle of the interferometer and first measurements on silicon spheres are described. |
