Karagioz O.V. ,   Izmailov V.P.

Russian version

The data base contains the results of measurements of the Newtonian gravitational constant G carried out from 1985 to recent time. It was accumulated 50 series of digital results of G measurements. In Table 1 there are the numbers of files and average results of G measured values.
Each of these values was obtained using the special system which consists of the torsion balance itself housed in the vacuum chamber, the test mass consisted of a cylindrical beam 23 cm long and 1.8 mm in diameter with its axis horizontal and with a 1.6 g sperical mass of diameter 7.2 mm at each end, the sourse-mass system consisted of two spherical masses at opposite ends of the suspended test mass with their centers aligned with the axis of the suspended beam (these masses could be moved individually or together along this axis), the optoelectronic angular displacement transducer which monitors the movement of the suspended beam. The system is self-contained and self-supporting.
The programm with two independent versions of calculation for G was developed. In one version an analytical formula which was received in view of the members of the fifth degree in decomposition of the moment of forces of an attraction of cooperating weights is used. In the other the calculations are carried out on the differential equation of movement of the torsion balance working body in view of the moment of forces created in the large masses.
Based on the results of the experiments agregated with the corresponding weight and take into account the key sources of the meterage's error, the average gravitation constant is defined as:

G = (6.6729 ± 0.0005) . 10 -11 N . m 2 kg -2 .

The value of Newtonian gravitational constant G recommended in 1998 by the CODATA Task Group on Fundamental Constants is
G = 6.673 . 10 -11 N . m 2 kg -2 .

The results of gravitational constant definitions, received by the different authors with the use of various external (attractive) masses are presented in Table 2 .
Data files and program for data processing are on this site. You can find there file "readme_en" with description of the program .
During the course of the measurements, a temporal shift of up to 0.001G and of unknown cause was observed in the values obtained. The processing of arrays with the help of spreadsheets has revealed in the results of G measurements some known space rhythms (solar, lunar, stars), which explanations yet have not been found.

Variations of the averaged through the twenty four hours values of G Variations of the averaged through the 
twenty four hours values of <B> G </B>

The similar results are detected also by other authors, investigating for a long time the periods of nucleuses half-lifes, biological rhythms, heliogeophysical electromagnetic perturbations. In particular, it is revealed, that the extremely high values of G fall on the minima of magnetic activity. The level of ionosphere perturbation generated by the solar chromosphere flares influences on dispersion of results.

The page is created on June, 15th, 2001.
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