[1008.3203] A Simple Pendulum Determination of the Gravitational Constant

Authors: Harold V. Parks, James E. Faller

Date: 19 Aug 2010

Abstract: We determined the Newtonian Constant of Gravitation G by interferometrically measuring the change in spacing between two free-hanging pendulum masses caused by the gravitational field from large tungsten source masses. We find a value for G of (6.672 34 +/- 0.000 14) x 10ˆ-11 mˆ3 kgˆ-1 sˆ-2. This value is in good agreement with the 1986 Committee on Data for Science and Technology (CODATA) value of (6.672 59 +/- 0.000 85) x 10ˆ-11 mˆ3 kgˆ-1 sˆ-2 [Rev. Mod. Phys. 59, 1121 (1987)] but differs from some more recent determinations as well as the latest CODATA recommendation of (6.674 28 +/- 0.000 67) x 10ˆ-11 mˆ3 kgˆ-1 sˆ-2 [Rev. Mod. Phys. 80, 633 (2008)].

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Aug 20, 2010

1008.3203 (/preprints)
2010-08-20, 08:30 [edit]


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