DETERMINATION OF THE ATOMIC MASS CONSTANT BY ION ACCUMULATION

Christian Schlegel, Michael Gläser, Frank Schlolz, Gabriela Bethke, Michael Mecke

Abstract

An experiment for the direct measurement of the atomic mass constant was performed by accumulating ions from an ion beam up to a weighable mass. The aim of this experiment was to develop an alternative approach for the redefinition of the SI unit kilogram. In a recent experiment a mass of about 300 mg bismuth was accumulated and the atomic mass unit could be determined with a relative uncertainty better than 1.0 × 10^-4.

Keywords

definition of SI-Unit Kilogram, mass accumulation, mass determination

Download

IMEKO-WC-2009-TC3-049.pdf

DOI

-

IMEKO TC

TC3 - Measurement of Force, Mass, Torque, and Gravity

Back to the proceedings