Electron impact excitation of the , , and states of CO at 10.0, 12.5 and 15.0 eV impact energies
Electron impact excitation of the , , and states of CO at 10.0, 12.5 and 15.0 eV impact energies
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CO 在 10.0、12.5 和 15.0 eV 冲击能量下的电子碰撞激发
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
S. Trajmar
中科院分区：
文献类型：
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作者：
P. Zetner;I. Kanik;S. Trajmar
我们测量了 CO 在 10-15 eV 冲击能量范围内的 、 、 和 状态的电子碰撞激发的微分和积分截面。这些测量填补了 Zobel 等人的低能（阈值约为 12 eV）数据与 Middleton 等人的中能（20-50 eV）结果之间存在的差距。最近的电子飞行时间测量被用来将相对横截面（从能量损失谱推导出来）置于绝对尺度上。横截面与 Zobel 等人在重叠冲击能量下获得的结果非常一致，并且总是顺利地推断出他们的低能量结果。外推到中间能量域并与 Middleton 等人的结果进行比较并不是那么清楚。与Sun等人的理论微分和积分截面以及Morgan和Tennyson的积分截面的比较揭示了角度和能量依赖性，这与实验结果相似，但在绝对大小方面存在严重差异。
We have measured the differential and integral cross sections for electron impact excitation of the , , and states of CO in the 10-15 eV impact energy region. These measurements fill the gap which existed between the low-energy (threshold to about 12 eV) data of Zobel et al and the intermediate energy (20-50 eV) results of Middleton et al. Recent electron time-of-flight measurements are utilized to place the relative cross sections (deduced from energy-loss spectra) on the absolute scale. The cross sections are in excellent agreement with the results obtained by Zobel et al at the overlapping impact energies and always smoothly extrapolate to their low-energy results. Extrapolation to the intermediate energy domain and comparison with the results of Middleton et al is not so clear. Comparison with theoretical differential and integral cross sections of Sun et al and the integral cross sections of Morgan and Tennyson reveals angular and energy dependences which resemble those found for the experimental results but there are serious discrepances concerning the absolute magnitudes.