Integral cross sections for electron impact excitation of electronic states of N2
Integral cross sections for electron impact excitation of electronic states of N2
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N2 电子态电子碰撞激发的积分截面
DOI：
10.1088/0953-4075/34/7/303
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
B. McLaughlin
中科院分区：
文献类型：
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作者：
L. Campbell;M. Brunger;A M Nolan;L J Kelly;A. B. Wedding;J. Harrison;P. Teubner;D. C. Cartwright;B. McLaughlin
本文报道了N2分子A3 +u，B 3 g，W3 Δu，B' 3-u，a' 1-u，a 1 g，ω1Δu，C3 u，E3 +g和a“1 +g电子态的电子碰撞激发积分截面.目前的数据，对于每一个状态，来自五个入射电子能量在15-50 eV的范围内，从早期的交叉束微分截面（DCS）的测量，我们的小组。在进行积分之前，通过使用分子相移分析技术将测得的DCS外推至0°和180°来促进这一点。提供了一个全面的比较，目前的ICSs与早期的实验研究结果，交叉束和电子群，和理论计算。这种比较清楚地表明，以前对这些激发电子态截面的一些估计需要重新评估。此外，我们已经使用了本ICSs在Monte Carlo模拟的行为建模的电子群在一个小电流N2放电的散装。从这个模拟确定的宏观输运参数进行了比较，从独立的群为基础的实验和我们的ICSs的自我一致性评估。
We report integral cross sections (ICSs) for electron impact excitation of the A 3Σ+u, B 3Πg, W 3Δu, B' 3Σ-u, a' 1Σ-u, a 1Πg, ω1Δu, C 3Πu, E 3Σ+g and a'' 1Σ+g electronic states of N2. The present data, for each state, were derived at five incident electron energies in the range 15-50 eV, from the earlier crossed-beam differential cross section (DCS) measurements of our group. This was facilitated by using a molecular phase shift analysis technique to extrapolate the measured DCSs to 0° and 180°, before performing the integration. A comprehensive comparison of the present ICSs with the results of earlier experimental studies, both crossed beam and electron swarm, and theoretical calculations is provided. This comparison clearly indicates that some of the previous estimates for these excited electronic-state cross sections need to be reassessed. In addition, we have used the present ICSs in a Monte Carlo simulation for modelling the behaviour of an electron swarm in the bulk of a low current N2 discharge. The macroscopic transport parameters determined from this simulation are compared against those measured from independent swarm-based experiments and the self-consistency of our ICSs evaluated.