大学物理 ›› 2012, Vol. 31 ›› Issue (9): 50-50.
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唐爽[1,2] 白翠琴[2] 马世红[2]
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摘要： 弗兰克-赫兹实验中，Ip-VGZKK信号的强度会随温度和灯丝电压而变化．本文发现在温度低于160℃时，Ip-VGZK信号强度随温度的升高而减小；当温度超过170℃后，信号随温度的升高而增大．本文提出了电场中Hg蒸气被热电离的模型，利用热力学平衡定律和Le Chateler原理，对此现象提出了合理的解释并通过了实验的验证．
关键词: 弗兰克-赫兹实验, Ip-VGZK信号强度, 热电离
Abstract: In the Franck-Hertz experiment, the intensity of iYp-V varies with the temperature of the oven and the voltage of the filament. We find that the intensity of Ip-V signal decreases with the temperature when the tem-perature is below 160 ℃, and increases with the temperature when the temperature is higher than 170 ℃. We then introduce the model of thermal excitation and ionization, which explains such phenomenon when the law of thermal-dynamic equilibrium and the Le Chateler＇s law are applied. After that, we have designed some additional experi- ments, whose results support our postulation.
Key words: Frank-Hertz experiment, Ip-V signal, thermal ionization
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唐爽[;] 白翠琴[] 马世红[]. 弗兰克-赫兹实验中电流信号强度随温度变化的现象[J]. 大学物理, 2012, 31(9): 50-50.
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https://dxwl.bnu.edu.cn/CN/Y2012/V31/I9/50
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