用单摆法测定引力常量
A Simple Pendulum Determination of the Gravitational Constant
摘要：
我们通过干涉测量由大钨源质量的引力场引起的两个自由悬挂的摆质量之间的间距变化来确定牛顿引力常数G。我们发现G的值为（6.672 34 +/- 0.000 14）x 10^-11 m^3 kg^-1 s^-2。这一数值与1986年科学和技术数据委员会（CODATA）的数值一致，（6.672 59 +/- 0.000 85）x 10^-11 m^3 kg^-1 s^-2 [修订版，模块，物理，59，1121（1987）]，但不同于最近的一些决定，以及最新的CODATA建议，（6.674 28 +/- 0.000 67）x 10^-11 m^3 kg^-1 s^-2 [Rev. Mod. Phys. 80，633（2008）]。
英文摘要：
We determined the Newtonian Constant of Gravitation G by interferometrically measuring the change in spacing between two free-hanging pendulum masses caused by the gravitational field from large tungsten source masses. We find a value for G of (6.672 34 +/- 0.000 14) x 10^-11 m^3 kg^-1 s^-2. This value is in good agreement with the 1986 Committee on Data for Science and Technology (CODATA) value of (6.672 59 +/- 0.000 85) x 10^-11 m^3 kg^-1 s^-2 [Rev. Mod. Phys. 59, 1121 (1987)] but differs from some more recent determinations as well as the latest CODATA recommendation of (6.674 28 +/- 0.000 67) x 10^-11 m^3 kg^-1 s^-2 [Rev. Mod. Phys. 80, 633 (2008)].
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