中国科学家测量最精确万有引力常数G之浅谈  

Chinese Scientists Measure the Most Accurate Gravitational ConstantG

作　　者：李继师 胡春艳 

机构地区：[1]广西民族大学数理学院物理系,广西南宁530006

出　　处：《大众科技》2020年第8期157-159,共3页Popular Science & Technology

摘　　要：我国科学家测出截止目前为止国际最精确万有引力常数G,成功入选2018年中国科学十大进展,相关成果也被编入高中物理教材,既体现我国的科研实力,也是党中央对教材思政的要求。文章简要介绍万有引力常数G测量历史,罗俊院士团队采用的两种测量方法——扭秤周期法和角加速度反馈方法的实验原理和装置,得到G值分别为6.674184×10^-11 m^3×kg^−1×s^−2和6.674484×10^-11 m^3×kg^−1×s^−2,将G值精确度提高到小数点后第四位,相对精度达到11.6 ppm。Chinese scientists have measured the most accurate gravitational constant G in the world so far,which has been successfully selected into the top ten scientific advances in Chinese in 2018,and the related achievements have also been included in physics textbooks for senior high schools,which not only reflects China's scientific research strength,but also meets the requirements of the Party Central Committee on textbook ideological and political education.This paper briefly introduces the historyof the measurement of the gravitational constant G.the experimental principle and device of two measurement methods,torsion balance period method and angular acceleration feedback method adopted by academician Luo Jun's team,show that the G values are 6.674184×10^−11 m^3×kg^−1×s^−2 and 6.674484×10^−11 m^3×kg^−1×s^−2,respectively.The accuracy of G value is improved to the fourth decimal place,and the relative accuracy is 11.6 ppm.

关 键 词：引力常数G 罗俊院士 扭秤周期法 角加速度反馈方法 

分 类 号：F290[经济管理—国民经济]