确定弗兰克-赫兹实验最佳工作参数的方法改进  

An Improved Method of Determining the Best Working Parameters of Franck-Hertz Experiment

作　　者：王杰[1] 司嵘嵘[1] WANG Jie;SI Rong-rong(Nanjing University of Science ＆ Technology,Jiangsu Nanjing 210094)

机构地区：[1]南京理工大学,江苏南京210094

出　　处：《大学物理实验》2018年第5期87-91,共5页Physical Experiment of College

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-UG2K curve 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 1.4V and the spurn voltage 6.0 V. Finally, the first excitation potential of argon atom was determined to be 11.537V under the optimal experimental condition.

关 键 词：弗兰克-赫兹实验 第一激发电位 灯丝电压 正向电压 拒斥电压 相关系数 标准偏差 

分 类 号：O562.2[理学—原子与分子物理]