The oscillator strengths and integral cross sections of the valence-shell excitations of SO 2 have been determined at an incident electron energy of 1.5 keV and an energy resolution of about 70 meV, which are of great importance for modeling the planet’s atmospheric phenomena and astronomical observations. By comparing the present results with the previous electron scattering ones, it is found that at impact electron energies below 200 eV, the first Born approximation is not satisfied for the valence-shell excitations of SO 2 . The optical oscillator strengths have been obtained by extrapolating the GOSs to the limit of zero squared momentum transfer, and the integral cross sections have been determined systematically from the threshold to 5000 eV with the aid of the BE-scaling method. The present integral cross sections of the valence-shell excitations of SO 2 can be used as important input parameters for models to extract the SO 2 concent...

中文翻译：

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快速电子撞击研究二氧化硫的价壳激发的振子强度和积分截面

在入射电子能量为1.5 keV且能量分辨率为约70 meV的情况下，已确定了SO 2的价壳激发的振荡器强度和积分截面，这对于模拟行星的大气现象和天文观测非常重要。通过将当前结果与先前的电子散射结果进行比较，发现在冲击电子能量低于200 eV时，SO 2的价壳激发不满足第一Born近似。通过将GOS外推至零平方动量传递的极限，可以获得光学振荡器的强度，并且借助BE缩放方法，系统地确定了从阈值到5000 eV的积分截面。