弗兰克-赫兹实验中氩原子第一激发电位的研究  

Study on the first excitation voltage of the argon atom in Frank-Hertz experiment

作　　者：孙桂芳 阮树仁 盛淑芳 钱霞 

机构地区：[1]聊城大学物理科学与信息工程学院山东省光通信科学与技术重点实验室,山东聊城252059

出　　处：《物理实验》2017年第B12期1-3,8,共4页Physics Experimentation

基　　金：聊城大学实验技术研究基金资助(No.LDSY2014034)

摘　　要：改进现有弗兰克-赫兹实验仪器:不使用控制电压,把第一栅极G1和第二栅极G2短接,并接到加速电压的正极,G2和A之间仍然接反向减速电压,这样G1和K之间为加速和碰撞区,G1和G2之间为等势碰撞区.当拒斥电压为9V,加速电压为80V,灯丝电压为2.4V时,曲线峰谷差值最大,分辨率最高.计算得到氩原子最外层8个电子中,外层电子的第一激发电位为13.13V,内层电子的第一激发电位为13.41V.The existing instrument of Frank-Hertz experiments was improved.The control voltage was cancelled.The first grid electrode G1 and the second one G2 were short connected,and they were connected to the anode of the acceleration voltage.The reversed voltage was still set between G2 and the anode A.Thus the region between G1 and K became the acceleration and collision region.The region between G1 and G2 was the collision region with the equal potential.As the parameters were set rejector voltage to be 9 V,acceleration voltage to be 80 V,the filament voltage to be 2.4 V,the difference between the peak and valley could be the maximum.And the resolution was optimal.The first excitation voltage of the outer electrons for the argon atoms was 13.13 V,and the first excitation voltage of the inner electrons was 13.41 V.

关 键 词：弗兰克-赫兹实验 第一激发电位 灯丝电压 拒斥电压 

分 类 号：O562[理学—原子与分子物理]