Spatial growth of ionization currents has been measured in CCl2F2/N2mixtures by the steady‐state Townsend method over the range of reduced fields 80 ≤E/p20≤180 V cm−1 Torr−1. The experimental values obtained differ markedly from those published in the literature. A detailed account of the various hypotheses used in the experiment is presented in the light of correspondence with the electron transport theory and is followed by a comparison of experimental data, i.e., limit fields (E/p20)*, ionization (agr;), attachment (eegr;), and effective ionization (agr;¯) coefficients, with available theoretical values from Boltzmann‐equation analysis of electron swarms in the pure gas and its mixture with N2. Good agreement with the theoretical calculations by J. P. Novak and M. F. Fre´chette J. Appl. Phys.57, 4368 (1985) provides further supporting evidence for the applicability of these authors’ proposed set of electron scattering cross sections and, in particular, favors the attachment cross sections reported by E. Illenberger, H.‐U. Scheunemann, and H. Baumga¨rtel Ber. Bunsenges. Phys. Chem.82, 1154 (1978); Chem. Phys.37, 21 (1979).
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机译：在CCl2F2/N2混合物中，通过稳态Townsend方法在80 ≤E/p20≤180 V cm−1 Torr−1范围内测量了电离电流的空间增长。得到的实验值与文献中发表的实验值有明显差异。根据与电子传输理论的对应关系，详细介绍了实验中使用的各种假设，然后比较了实验数据，即极限场 （E/p20）*、电离 （&agr;）、附着 （&egr;） 和有效电离 （&agr; ̄） 系数，以及玻尔兹曼&连字符方程分析中纯气体中的电子群及其与 N2 的混合物的可用理论值。与 J. P. Novak 和 M. F. Fre'chette [J. Appl. Phys.57， 4368 （1985）] 的理论计算非常吻合，为这些作者提出的一组电子散射截面的适用性提供了进一步的支持证据，特别是有利于 E. Illenberger、H.‐U. Scheunemann 和 H. Baumga ̈rtel [Ber 报告的附着截面。Bunsenges。Phys. Chem.82， 1154 （1978）;Chem. Phys.37， 21 （1979）].
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