Present Status of the Avogrado Constant Determination from Silicon Crystals with Natural Isotopic Composition

BECKER P.; BETTIN H.; DE BIEVRE Paul; FUJII K.; KUETGENS U.; KURAMO N.; MANA G.; MASSA M.; MATYI R.; MIZUSHIMA S.; NICOLAUS A.; TAYLOR PHILIP; VALKIERS STAF; WASEDA A.

Present Status of the Avogrado Constant Determination from Silicon Crystals with Natural Isotopic Composition

Authors: BECKER P.
BETTIN H.
DE BIEVRE Paul
FUJII K.
KUETGENS U.
KURAMO N.
MANA G.
MASSA M.
MATYI R.
MIZUSHIMA S.
NICOLAUS A.
TAYLOR PHILIP
VALKIERS STAF
WASEDA A.
Publication date: 25 August 2005
Publisher: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Abstract

The determination of the Avogadro Constant from selected silicon crystals is described. The density molar mass and lattice spacing of the 2 crystals were measured at NMIJ, PTB, IRMM, IMGC and NIST. When all date are combined, it leads to the Avogadro Constant of 6.022 135 3 (21) 10^23 mol^-1.JRC.D.4-Isotope measurement

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