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Determination of the Gravitational Constant

  • Stephan Schlamminger
  • Eugen Holzschuh
  • Walter Kündig
  • Frithjof Nolting
  • Jürgen Schurr
Conference paper
Part of the Lecture Notes in Physics book series (LNP, volume 562)

Abstract

The Newtonian gravitational constant G was the first known fundamental constant of physics. Nevertheless, the measurement of its value still seem to be in a rather sad shape. Recently, the CODATA Task Group on Fundamental Constants recommended a preliminary value of G with a relative uncertainty of 0.15 %. This is more than ten times larger as the previous recommendation!

In the first part of this lecture, a brief summary is given of recent experimental efforts to determine G. The second part is a description of our experiment at the University of Zürich.

We use a beam balance to measure the gravitational forces of large field masses (13.5 × 103 kg mercury) on 1 kg test masses. A first result with an uncertainty of 220 × 10?6 has been published recently. Presently we are working to improve the experiment.

Keywords

Systematic Uncertainty Test Mass Fundamental Constant Beam Balance Torsion Balance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • Stephan Schlamminger
    • 1
  • Eugen Holzschuh
    • 1
  • Walter Kündig
    • 1
  • Frithjof Nolting
    • 2
  • Jürgen Schurr
    • 3
  1. 1.Physik-InstitutUniversität ZürichZürichSwitzerland
  2. 2.Lawrence Berkeley National LaboratoryBerkeleyUSA
  3. 3.Physikalisch Technische BundesanstaltBraunschweigGermany

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