Vibrational excitation of polar molecules by electron impact. II. Direct and resonant excitation in H2O
Vibrational excitation of polar molecules by electron impact. II. Direct and resonant excitation in H2O
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通过电子碰撞激发极性分子的振动。
DOI：
10.1088/0022-3700/9/14/021
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发表时间：
1976
期刊：
影响因子：
--
通讯作者：
F. Linder
中科院分区：
文献类型：
--
作者：
G. Seng;F. Linder
关于PT，见同上，第9卷，第14期，第2521页（1976）。用交叉束方法进行了微分散射实验，研究了电子碰撞H2O的振动激发，碰撞能量从阈值到10 eV。（100，001）和010模激发的微分和积分截面以绝对单位给出。观察到两个不同的共振区域，它们叠加在直接激发的背景上：强而尖锐的阈值共振和以6-8 eV为中心的宽共振区域。在6 eV附近的截面的广泛增强归因于H2O-的非常短寿命的2A 1状态。阈值共振被解释为准束缚态的偶极场的水。预计它们在电子-极性-分子相互作用中具有普遍的重要性。
For pt.I see ibid., vol.9, no.14, p.2521 (1976). Differential scattering experiments with the crossed-beam method have been performed to study vibrational excitation of H2O by electron impact for collision energies from threshold to 10 eV. Differential and integral cross sections for the excitation of the (100, 001) and 010 modes are given in absolute units. Two distinct resonance regions are observed which are superimposed on a background of direct excitation: strong and sharp threshold resonances and a broad resonance region centred around 6-8 eV. The broad enhancement of the cross sections around 6 eV is attributed to a very short-lived 2A1 state of H2O-. The threshold resonances are interpreted as quasi-bound states in the dipole field of H2O. They are expected to be of general importance in electron-polar-molecule interactions.