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Phys. Rev. D 71, 022002 (2005) [5 pages]

Gravitational constant G measured with a superconducting gravimeter

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P. Baldi and E. G. Campari*
Dipartimento di Fisica, Universita’ di Bologna, viale Berti-Pichat 6/2 40127 Bologna Italy

G. Casula†
Istituto Nazionale di Geofisica e Vulcanologia, sede di Bologna, via Donato Creti 12 40128 Bologna Italy

S. Focardi, G. Levi, and F. Palmonari‡
Dipartimento di Fisica, Universita’ di Bologna and INFN sezione di Bologna, viale Berti-Pichat 6/2 40127 Bologna Italy

Received 8 September 2004; published 31 January 2005

We report in this paper the results of a measurement of the gravitational constant G obtained in a laboratory at distances of about 1 m, using a superconducting gravimeter. The instrument measured the gravitational effect due to an annular mass of about 280 kg moving up and down around the gravimeter. The experiment yielded for the gravitational constant the value G=(6.675±0.007)10-11Nm2/kg2 which agrees, within its uncertainty, with the last CODATA value.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.71.022002
DOI:
10.1103/PhysRevD.71.022002
PACS:
04.80.–y, 85.25.–j, 94.10.Jd

*Electronic address: enrico.campari@unibo.it, baldi@ibogfs.df.unibo.it

†Electronic address: casula@bo.ingv.it

‡Electronic address: focardi@bo.infn.it, levi@bo.infn.it, palmonari@bo.infn.it

 
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