| 万有引力常数G的精确测量(英文) |
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| 作者姓名： | 罗俊 许厚泽 |
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| 作者单位： | 1. 华中科学技术大学物理系, 武汉 430074;
2. 中国科学院测量与地球物理研究所, 武汉 430074 |
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| 摘 要： | 采用长周期、高Q值的扭秤,并选择恒温、隔振、电磁屏蔽以及外界引力干扰小的实验环境,从而有效克服传统扭秤实验中扭丝的滞弹性和热弹性等影响,采用扭秤周期法在 105×10-6相对精度上测量万有引力常数G。为了进一步提高G的测量精度,还系统研究了精密扭秤实验的各种系统误差及其对G的影响
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| 关 键 词： | 万有引力常数 精密测量 扭秤 |
| 收稿时间： | 2002-12-22 |
Determination of Newtonian Gravitational Constant G with Swing Time Method |
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| Authors: | LUO Jun HSU Houze |
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| Institution: | 1. Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China;
2. Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430074, China |
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| Abstract: | 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 |
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| Keywords: | gravitational constant G precision measurement torsion balance |
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