Physics
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990geoji.101..329m&link_type=abstract
Geophysical Journal International (ISSN 0955-419X), vol. 101, May 1990, p. 329-344.
Physics
12
Gravimeters, Gravitation Theory, Hydroelectricity, Lakes, Nonnewtonian Fluids, Earth Tides, Pressure Measurement, Temperature Profiles
Scientific paper
Results are presented on experiments designed to search for deviations from Newton's gravitational law due to a newly postulated interaction (the 'fifth force'), whose range is somewhere between 1 and 1000 m, using gravimeters placed in a hydroelectric lake (the Hornberg reservoir, Germany). The technique was to construct residual signals, i.e., to subtract from observed gravity such known effects as the Newtonian attraction of the moving water masses and the earth tides, and to search by regression analysis in the residual signal for a residual component proportional to the Newtonian attraction. Residual water signals with amplitudes of 0.25 + or - 0.4 percent of the Newtonian water signals were found. This implies negative evidence for a residual water signal and, hence, for non-Newtonian gravitation. The major limitation of the Hornberg experiment is due to calibration errors (0.2-0.4 percent) of the gravimeters, which were revealed by comparison of the records of neighboring instruments.
Lindner Kai
Mueller George
Roesch N.
Zuern W.
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