Ramsauer-Townsend 效应与Child-Langmuir 定律实验

赵元晟; 贾晓瀚; 姚红英

doi:10.16854 /j.cnki.1000-0712.170632

大学物理 >

2018 , Vol. 37 >Issue 10: 47 - 53

DOI: https://doi.org/10.16854 /j.cnki.1000-0712.170632

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Ramsauer-Townsend 效应与Child-Langmuir 定律实验

赵元晟 ,
贾晓瀚 ,
姚红英

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复旦大学物理学系，上海200433

赵元晟( 1996—) ，男，浙江杭州人，复旦大学物理学系2014 级本科生

收稿日期: 2017-11-20

修回日期: 2018-04-13

网络出版日期: 2018-10-20

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Ramsauer-Townsend effect and Child-Langmuir law experiments

ZHAO Yuan-sheng ,
JIA Xiao-han ,
YAO Hong-ying

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Department of Physics，Fudan University，Shanghai 200433，China

Received date: 2017-11-20

Revised date: 2018-04-13

Online published: 2018-10-20

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摘要

使用Hartree-极化势分析了用气体闸流管得到的Ramsauer-Townsend 效应曲线; 考虑了电子存在初速度等因素，定量分析了Child-Langmuir 定律实验中出现的lnI 和lnVa(Va为加速电压)之间的斜率小于3 /2 的现象.

关键词： Ramsauer-Townsend效应; Child-Langmuir 定律; 气体闸流管

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赵元晟 , 贾晓瀚 , 姚红英 . Ramsauer-Townsend 效应与Child-Langmuir 定律实验[J]. 大学物理, 2018 , 37(10) : 47 -53 . DOI: 10.16854 /j.cnki.1000-0712.170632

Abstract

Using a Hartree-polarization potential，the curve of the Ramsauer-Townsend effect obtained by a thyratron is analyzed. We also quantitatively investigate the phenomenon which occurs in the experiment of the Child-Langmuir law that the slope between ln I and ln Va ( where Va is the accelerating voltage) is less than 3 /2，by considering that the electrons have initial velocity.

Key words： Ramsauer-Townsend effect; Child-Langmuir law; Thyratron

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