Very low energy electron scattering in some hydrocarbons and perfluorocarbons
Very low energy electron scattering in some hydrocarbons and perfluorocarbons
复制标题
某些碳氢化合物和全氟化碳中的电子散射能量非常低
DOI：
10.1088/0953-4075/31/18/019
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
D. Field
中科院分区：
文献类型：
--
作者：
S. Lunt;J. Randell;J. Ziesel;G. Mrotzek;D. Field
低能散射已在 、 、 、 、 和 中使用同步辐射光电离源的传输实验进行了研究。后向散射截面已在 10-175 meV 的能量范围内确定。使用改进的有效范围理论分析了非极性和弱极性物质的这些横截面随电子碰撞能量的变化，产生散射长度和低能限制横截面。旋转非弹性散射截面已使用第一玻恩点偶极近似进行计算。结果表明，旋转非弹性事件对 中的低能量散射有很大贡献，但在 中的贡献很小，反映了 中较大的偶极矩。
Low-energy scattering has been studied in , , , , , and in a transmission experiment using a synchrotron radiation photoionization source. Backward scattering cross-sections have been determined over the energy range 10-175 meV. The variation of these cross-sections with electron impact energy has been analysed for non-polar and weakly polar species using modified effective range theory, yielding scattering lengths and low-energy limiting cross-sections. Rotationally inelastic scattering cross-sections have been calculated for and using the first Born point-dipole approximation. Results suggest that rotationally inelastic events contribute strongly to low energy scattering in but only weakly in , reflecting the larger dipole moment in .