Primary Ionization Coefficient of Helium
Primary Ionization Coefficient of Helium
复制标题
氦的一次电离系数
DOI：
10.1088/0370-1328/80/4/312
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发表时间：
1962
期刊：
影响因子：
--
通讯作者：
C. Morgan
中科院分区：
文献类型：
--
作者：
D. K. Davies;F. L. Jones;C. Morgan
在6leq E/p leq 100v cm-1 mm Hg-1和3leq p leq 115 mm Hg的范围内，测量了光谱纯氦在平面平行银电极之间的电离电流，间隔可达0.75 cm。由这些测量得到的初级电离系数α/p比以前发表的实验值要低，特别是在E/p的最低范围内。在实验误差范围内，α/p只是E/p的函数。α/p的现值与邓洛普在1949年、Abdelnabi和Massey在1953年以及菲尔普斯在1960年计算的值符合得很好。这一结果表明，电子速度的SMIT分布、Maier-Leibnitz的非弹性碰撞截面数据和Nielsen的电子迁移率值适用于该数据。
Ionization currents in spectroscopically pure helium between plane parallel silver electrodes at separations up to 0.75 cm were measured in the range 6 leq E/p leq 100 v cm-1 mmHg-1 and 3 leq p leq 115 mmHg where E is the applied electric field and p the gas pressure. The values of the primary ionization coefficient α/p deduced from these measurements were lower than previously published experimental values, particularly at the lowest range of E/p. Within the limits of experimental error α/p was found to be a function of E/p only. The present values of α/p were in good agreement with the values calculated by Dunlop in 1949, by Abdelnabi and Massey in 1953 and by Phelps in 1960. This result suggests that the Smit distribution of electron velocities, Maier-Leibnitz's inelastic collision cross section data and Nielsen's electron mobility values are applicable to the data.