Determination of the gravitational constant at an effective mass separation of 22 m

Moore, G. I., Stacey, F. D., Tuck, G. J., Goodwin, B. D., Linthorne, N. P., Barton, M. A., Reid, D. M. and Agnew, G. D. (1988) Determination of the gravitational constant at an effective mass separation of 22 m. Physical Review D, 38 4: 1023-1029. doi:10.1103/PhysRevD.38.1023


Author Moore, G. I.
Stacey, F. D.
Tuck, G. J.
Goodwin, B. D.
Linthorne, N. P.
Barton, M. A.
Reid, D. M.
Agnew, G. D.
Title Determination of the gravitational constant at an effective mass separation of 22 m
Journal name Physical Review D   Check publisher's open access policy
ISSN 0556-2821
Publication date 1988-01-01
Sub-type Article (original research)
DOI 10.1103/PhysRevD.38.1023
Open Access Status Not Open Access
Volume 38
Issue 4
Start page 1023
End page 1029
Total pages 7
Subject 3101 Physics and Astronomy (miscellaneous)
Abstract A vacuum balance that compares the weights of 10-kg stainless-steel masses suspended in evacuated tubes at different levels in a hydroelectric reservoir is being used to measure the gravitational attractions of layers of lake water up to 10 m in depth. The mean effective distance between interacting masses in this experiment is 22 m, making it the largest-scale measurement of G using precisely controlled moving masses. The experiment extends laboratory-type measurements into the range previously explored only by geophysical methods. Assuming purely Newtonian physics the value of the gravitational constant determined from data obtained so far is G=6.689(57)×10-11 m3 kg-1s-2, which agrees with laboratory estimates. The data admit at a 0.6 standard deviation level the parameters of non-Newtonian gravity inferred from geophysical measurements in mines and a tower. These measurements push the estimated ranges of non-Newtonian forces down to a scale accessible to our reservoir experiment, so that experimental improvements now at hand may provide a critical test of non-Newtonian effects.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
 
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