Vibrational excitation of symmetric and bending modes of H2O by slow electron impact
Vibrational excitation of symmetric and bending modes of H2O by slow electron impact
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慢电子碰撞对 H2O 对称和弯曲模式的振动激发
DOI：
10.1088/0022-3700/16/11/005
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发表时间：
1983
期刊：
影响因子：
--
通讯作者：
D. Thompson
中科院分区：
文献类型：
--
作者：
A. Jain;D. Thompson
在固定核中计算 H2O 分子对称 (100) 和弯曲 (010) 模式的电子碰撞振动激发截面（微分、积分和动量传递）以及从阈值到 10 eV 的脉冲近似值。法向坐标相关的 K 矩阵元素通过实验室框架第一 Born 矩阵元素进行增强，以获得更高的角动量，以便通过闭合公式获得收敛的横截面。在积分截面中，在 6-8 eV 附近可以看到尖锐的阈值峰和宽的共振结构，这与最近的观察结果一致：虽然 A1 散射态发挥着重要作用，但对这一广泛特征的主要贡献是 B2 态。所有结果与 Seng 和 Linder (1974) 的交叉光束实验结果非常吻合。
Electron impact vibrational excitation cross sections (differential, integral and momentum transfer) for the symmetric (100) and the bending (010) modes of the H2O molecule are calculated in the fixed-nuclei and the impulse approximations from threshold to 10 eV. The normal coordinate dependent K-matrix elements are augmented with the laboratory frame first Born matrix elements for higher angular momenta in order to obtain converged cross sections via a closure formula. A sharp threshold peak and a broad resonance structure is seen around 6-8 eV in the integral cross section in agreement with the recent observations: while the A1 scattering state plays a not unimportant role, the major contribution to this broad feature is due to the B2 state. All results compare well with the crossed-beam experimental results of Seng and Linder (1974).