Precision Measurement of Distribution of Film Thickness on Pendulum for Experiment of <EM>G</EM>

doi:10.1088/0256-307X/26/9/090402

Chin. Phys. Lett.

2009, Vol. 26

Issue (9): 090402 DOI: 10.1088/0256-307X/26/9/090402

GENERAL

Precision Measurement of Distribution of Film Thickness on Pendulum for Experiment of G

LIU Lin-Xia, GUAN Sheng-Guo, LIU Qi, ZHANG Ya-Ting, SHAO Cheng-Gang,
LUO Jun

Department of Physics, Huazhong University of Science and Technology, Wuhan 430074

Cite this article:

LIU Lin-Xia, GUAN Sheng-Guo, LIU Qi et al 2009 Chin. Phys. Lett. 26 090402

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Abstract Distribution of film thickness coated on the pendulum of measuring the Newton gravitational constant G is determined with a weighing method by means of a precision mass comparator. The experimental result shows that the gold film on the pendulum will contribute a correction of -24.3ppm to our G measurement with an uncertainty of 4.3ppm, which is significant for improving the G value with high precision.

Keywords: 04.80.Cc 81.15.Aa 81.15.Cd

Received: 27 March 2009 Published: 28 August 2009

PACS:	04.80.Cc	(Experimental tests of gravitational theories)
	81.15.Aa	(Theory and models of film growth)
	81.15.Cd	(Deposition by sputtering)

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https://cpl.iphy.ac.cn/10.1088/0256-307X/26/9/090402 OR https://cpl.iphy.ac.cn/Y2009/V26/I9/090402

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	LIU Lin-Xia
	GUAN Sheng-Guo
	LIU Qi
	ZHANG Ya-Ting
	SHAO Cheng-Gang
	LUO Jun

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