收稿日期: 2002-12-22
网络出版日期: 2003-05-10
Determination of Newtonian Gravitational Constant G with Swing Time Method
Received date: 2002-12-22
Online published: 2003-05-10
Supported by
supported by the National Natural Science Foundation of China
罗俊 , 许厚泽 . 万有引力常数G的精确测量(英文)[J]. 中国科学院大学学报, 2003 , 20(3) : 368 -375 . DOI: 10.7523/j.issn.2095-6134.2003.3.018
The Newtonian gravitational constant G is being determined with relative uncertainty of 105 parts per million by means of a high-Q torsion pendulum and the time-of-swing method, in which the period of the pendulum is altered by the presence of two 6.25 kg stainless steel cylinders.To improve the experimental precision, the properties and the systematic errors of the torsion pendulum have been studied in detail.The experimental results show that the uncertainty of G due to the fiber nonlinearity would be less than 1×10-6, the ambient temperature fluctuation with one degree would introduce a considerable uncertainty about 165 ×10-6 in the torsion spring constant
Key words： gravitational constant G; precision measurement; torsion balance
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