Electron scattering cross sections from NH 3 : a comprehensive study based on R-matrix method

作者：Yingqi Chen, X. Y. Jiang, Lufeng Yao, Wei Jiang, Hainan Liu, Ya Zhang · 发表于：Plasma Sources Science and Technology · 年份：2023 · DOI：10.1088/1361-6595/acca46 · 被引用次数：13 · 研究领域：Atomic and Molecular Physics、Advanced Chemical Physics Studies、Mass Spectrometry Techniques and Applications

Abstract In this study, a comprehensive cross-sectional computation on the electron scattering from NH 3 was performed using the frame of the R -matrix method. Cross section sets for total elastic, differential, momentum transfer, total ionization, and electronic excitation are presented. The electron-impact dissociation of NH 3 to NH 2 + H and NH+H 2 was considered by summing up the cross sections for the molecular dissociative excitations to the correlated dissociation channels. The reported cross sections for vibrational excitation of NH 3 remain controversial and are unable to distinguish the N–H symmetric and asymmetric stretching modes of close frequencies. Here, the excitation cross section for each vibrational mode of NH 3 was computed by applying the theoretical approach combining the fixed-nuclei R -matrix method, normal mode approximation and the vibrational frame transformation. The uncertainties of the cross section sets computed in this study were estimated for convenience of use in the plasma modeling.