低能氢原子与中性氧碰撞中的激发和电荷转移
Excitation and charge transfer in low-energy hydrogen atom collisions with neutral oxygen
摘要：
研究低能O+H碰撞中的激发和电荷转移，这是模拟恒星光谱和获得包括太阳在内的晚型恒星中精确氧丰度的重要问题。碰撞理论上已经研究了使用先前提出的方法的基础上的渐近双电子线性组合的原子轨道（LCAO）模型的离子-共价相互作用的中性原子-氢原子系统，连同多通道Landau-Zener模型。该方法已被扩展到包括配置涉及激发态的氢使用的两电子跃迁耦合的估计，但这种扩展被发现不会导致任何显着的高速率。速率系数计算的温度范围在1000 - 20000 K，和电荷转移和（去）激发过程涉及的第一激发S-状态，4s.5So和4s.3So，被发现具有最高的速率。
英文摘要：
Excitation and charge transfer in low-energy O+H collisions is studied; it is a problem of importance for modelling stellar spectra and obtaining accurate oxygen abundances in late-type stars including the Sun. The collisions have been studied theoretically using a previously presented method based on an asymptotic two-electron linear combination of atomic orbitals (LCAO) model of ionic-covalent interactions in the neutral atom-hydrogen-atom system, together with the multichannel Landau-Zener model. The method has been extended to include configurations involving excited states of hydrogen using an estimate for the two-electron transition coupling, but this extension was found to not lead to any remarkably high rates. Rate coefficients are calculated for temperatures in the range 1000 - 20000 K, and charge transfer and (de)excitation processes involving the first excited S-states, 4s.5So and 4s.3So, are found to have the highest rates.
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