摘要
电子流在与气体闸流管中稀有气体作用时,出现经典理论无法解释的冉绍尔-汤森效应,即气体散射截面和电子速度有关.研究了此过程中几何因子、散射概率和总散射截面随电子速度的变化规律,验证了冉绍尔-汤森效应.探究了实验中出现的阴极电流和加速电压偏离二分之三关系的现象,利用排除法确定了可能的原因:经典Drude模型无法较好地描述电子和气体的碰撞.
When electrons interact with rare gas in the thyratron ,Ramsauer‐Townsend effect will appear ,which can’t be explained by the traditional model .The scattering cross‐section will change as the speed of electron varies .The variation of geometric factor ,scattering probability and total scatter‐ing cross‐section were explored when the speed of electrons changed ,then the Ramsauer‐Townsend effect was demonstrated .Deviation from the Child‐Langmuir law was observed ,and possible explana‐tion for it was researched .By using exclusive method ,a possible explanation was found and demon‐strated .
出处
《物理实验》
2015年第3期1-5,9,共6页
Physics Experimentation
关键词
冉绍尔-汤森效应
气体闸流管
二分之三关系
总散射截面
Ramsauer-Townsend effect
gas thyratron
Child-Langmuir law
total scattering cross-section
