The Absorption Coefficient for Slow Electrons in Gases.
The Absorption Coefficient for Slow Electrons in Gases.
复制标题
气体中慢电子的吸收系数。
DOI：
10.7907/t3mb-za81
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发表时间：
1925
期刊：
影响因子：
--
通讯作者：
R. B. Brode
中科院分区：
文献类型：
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作者：
R. B. Brode
来自加热灯丝的电子通过狭缝被加速，并围绕圆形路径被磁偏转到连接到检流计的法拉第圆柱体中。从电流计电流G与来自灯丝的总电子电流M的比率的对数的曲线图，作为压力的函数，确定了从2到360的各种加速电压的吸收系数。对于给定的电压，发现吸收系数与电流M无关，也与压强无关（在约10^-2 mm处）。对Mayer和Ramsauer的结果进行了氩和氦的检验。在氩气中，该系数在约12伏时达到最大值，2伏时的值仅为最大值的五分之一。在氦气中，最大值为4伏。甲烷的曲线与此相似，在7.5伏左右达到最大值，这与阿克森的结果一致。氮气和一氧化碳的曲线几乎相同，都在约18伏处具有最大值，在约9伏处具有最小值。氢的曲线没有显示出最大值，系数稳定地增加到2伏。
Electrons from a heated filament were accelerated through a slit and deflected magnetically around a circular path into a Faraday cylinder connected to a galvanometer. From the plots of the logarithm of the ratio of the galvanometer current G to the total electron current M from the filament, as a function of the pressure, the absorption coefficients were determined for various accelerating voltages from 2 to 360. For a given voltage, the absorption coefficient was found to be independent of the current M and also of the pressure (at about 10^-2 mm). The results of Mayer and Ramsauer were checked for argon and helium. In argon, the coefficient reaches a sharp maximum at about 12 volts, the value for 2 volts being only one-fifth of the maximum value. In helium there is a maximum at 4 volts. Methane gave a curve similar to these, with a maximum at about 7.5 volts, which is in agreement with the results of Akesson. The curves for nitrogen and carbon monoxide are nearly identical, both having a maximum at about 18 volts and a minimum at about 9 volts. The curve for hydrogen shows no maximum, the coefficient increasing steadily down to 2 volts.