摘要
文章研究了弗兰克-赫兹实验的最佳实验条件和氩原子的第一激发电位,通过分析不同实验条件下的板极电流随加速电压的变化曲线,并结合不同实验条件下峰位序数与对应加速电压进行最小二乘法拟合所得直线的相关系数以及氩原子第一激发电位的标准偏差,确定使用该弗兰克-赫兹管进行实验时的最佳实验条件为:灯丝电压3.1 V,正向电压1.4 V,拒斥电压6.0 V。最后,在最佳实验条件下测定了氩原子的第一激发电位为11.537 V。
The optimal experimental condition and the first excitation potential of argon atom were studied.Through the analysis of the IA-UG2 Kcurve of different experimental conditions and the connection of peak positions with the linear correlation coefficient by the least squares fitting and the standard deviation of the first excitation potential of argon atom,optimized parameters of the Franck-Hertz experiment was determined.Optimum parameters were as follows: the filament voltage 3.1 V,the forward voltage 1.4 V and the spurn voltage 6.0 V.Finally,the first excitation potential of argon atom was determined to be 11.537 V under the optimal experimental condition.
引文
[1]张里荃,马艳梅,郝二娟.弗兰克-赫兹实验最佳实验条件及第一激发电位的研究[J].物理实验,2011,31(8):37-38.
[2]孙桂芳,阮树仁,盛淑芳,等.弗兰克-赫兹实验中氩原子第一激发电位的研究[J].物理实验,2017,12(增):1-3.
[3]朱筱玮,陈永丽.充氩弗兰克-赫兹实验研究[J].大学物理,2007,26(7):46-48.
[4]安可,高松松,林上金,等.如何选择弗兰克-赫兹实验的工作参量[J].大学物理实验,2014,27(6):34-36.
[5]谭伟石.近代物理实验[M].南京:南京大学出版社,2013:1-3.
[6]金哲.弗兰克-赫兹实验最佳条件的确定[J].延边大学学报,2006,32(3):169-171.
[7]赵玉娜,马俊刚,丛红路,等.弗兰克-赫兹实验中两种测量模式及数据处理探讨[J].大学物理实验,2017,30(3):121-124.