Measurement of Newton's constant using a torsion balance with angular acceleration feedback

被引：199
|
作者：
Gundlach, JH [1 ]
Merkowitz, SM [1 ]
机构：
[1] Univ Washington, Dept Phys, Phys Nucl Lab, Seattle, WA 98195 USA
来源：
PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 14期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevLett.85.2869
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We measured Newton's gravitational constant G using a new torsion balance method. Our technique greatly reduces several sources of uncertainty compared to previous measurements: (1) It is insensitive to anelastic torsion fiber properties; (2) a flat plate pendulum minimizes the sensitivity due to the pendulum density distribution; (3) continuous attractor rotation reduces background noise. We obtain G = (6.674215 +/- 0.000092) X 10(-11) m(3) kg(-1) s(-2); the Earth's mass is, therefore, M+ = (5.972245 +/- 0.000082) X 10(24) kg and the Sun's mass is M-. = (1.988435 +/- 0.000027) X 10(30) kg.
引用
收藏
页码：2869 / 2872
页数：4
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