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

被引：204

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

页码：2869 / 2872

页数：4

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