Low-energy electron impact excitation of the nitrogen molecule: optically forbidden transitions
Low-energy electron impact excitation of the nitrogen molecule: optically forbidden transitions
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氮分子的低能电子碰撞激发：光学禁戒跃迁
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
P. Burke
中科院分区：
文献类型：
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作者：
C. Gillan;J. Tennyson;B. McLaughlin;P. Burke
从头计算的散射系统上进行，在低冲击能量，使用R-矩阵技术。的基态和最低的七个价激发态，，和，的被包括在紧密耦合的扩展与每个状态表示的配置相互作用波函数在一个混合轨道集。各种近似的目标和入射电子之间的相关表示进行了研究。积分和微分散射截面，并与实验进行比较，从地面水平的光禁止水平的激发。该结果与该能量区域最近的实验相比具有优势，并消除了我们之前工作中的一些问题。
Ab initio calculations are performed on the scattering system, at low impact energies, using the R-matrix technique. The ground state and the lowest seven valence excited states, , and , of are included in the close coupling expansion with each state being represented by a configuration interaction wavefunction in a hybrid orbital set. Various approximations for the representation of the correlation between the target and the incident electron are investigated. Integrated and differential scattering cross sections are presented, and compared to experiment, for excitation from the ground level to optically forbidden levels. The results compare favourably with recent experiments in this energy region and remove a number of problems with our previous work.