摘要
对极板电流与加速电压关系曲线的峰点连线和谷底高度所代表的物理意义进行分析.研究发现,峰点连线的斜率反映的是弗兰克赫兹管的临界电导,而谷底高度反映的是热电子与气体原子不发生碰撞损失能量的概率——由此形成谷底电流.结果表明临界电导越大,谷底电流越小,测量精度越高,实验效果越显著.
This paper studies the physical significance of the peak-point connection and bottom height of accelerating voltage versus anode current curve.It is discovered that the slope of peak-point connection reflects the threshold conductance of Franck-Hertz tube,while the bottom height reflects the probability of not losing energy of accelerated electrons and gas atoms in non-collisions which forms though current.The results show that the larger the threshold conductance is and the smaller the bottom current is,the more accurate the measurement is and the more obvious the result of the experiment is.
出处
《太原师范学院学报（自然科学版）》
2010年第2期87-89,共3页
Journal of Taiyuan Normal University:Natural Science Edition
关键词
弗兰克赫兹实验
临界电导
谷底电流
Franck-Hertz experiment
threshold conductance
trough current
