Emission of Radiation in the Vacuum Ultraviolet by Impact of Electrons on Carbon Monoxide
Emission of Radiation in the Vacuum Ultraviolet by Impact of Electrons on Carbon Monoxide
复制标题
电子撞击一氧化碳在真空紫外线中发射辐射
DOI：
10.1063/1.1672785
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发表时间：
1970
影响因子：
4.4
通讯作者：
F. J. Heer
中科院分区：
文献类型：
--
作者：
J. Aarts;F. J. Heer
我们测量了CO上0.1-5‐keV电子在真空紫外线下辐射发射的相对截面。研究的分子跃迁是第四正带系统A 1Π−X 1Σ+和Hopfield-Birge带系统B 1Σ+−X 1Σ+和C 1Σ+−X 1Σ+。横截面的绝对值是通过对Lassettre及其同事的非弹性散射实验结果的归一化得到的。与X 1Σ+的零振动水平相结合的跃迁的表观横截面与气体压力密切相关。这可能是由共振辐射的捕获引起的。我们的结果表明，对于第四正极带体系的不同跃迁，电子跃迁矩不是恒定的。通过观察碎片原子和离子的原子辐射，研究了解离激发过程。讨论了该方法在真空紫外波段强度标定中的应用。
We have measured relative cross sections for emission of radiation in the vacuum ultraviolet in the case of 0.1–5‐keV electrons on CO. The molecular transitions studied are the fourth positive band system A 1Π−X 1Σ+ and the Hopfield–Birge band systems B 1Σ+−X 1Σ+ and C 1Σ+−X 1Σ+. Absolute values for the cross sections are obtained by normalization on those evaluated from inelastic scattering experiments of Lassettre and co‐workers. The apparent cross sections for the transitions which combine with the zero vibrational level of X 1Σ+ are found to depend strongly on the gas pressure. This is probably caused by trapping of resonance radiation. There are indications in our results, that the electronic transition moment is not constant for the different transitions in the fourth positive band system. Dissociative excitation processes have been studied by observation of atomic radiation of fragment atoms and ions. Applications in the intensity calibration in the vacuum ultraviolet wavelength region are discussed.