Radiative Charge Transfer in Collisions of Li With H+
Radiative Charge Transfer in Collisions of Li With H+
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DOI：
10.1086/178044
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发表时间：
1996-11
期刊：
影响因子：
--
通讯作者：
P. Stancil;B. Zygelman
中科院分区：
文献类型：
--
作者：
P. Stancil;B. Zygelman
本文给出了Li（2s）+ H+ → Li+（1 s2）+ H（1 s）] + H ω的辐射电荷转移过程的截面，碰撞能量在0.1meV ~ 10 eV之间，速率系数在10 ~ 40，000 K之间。在300 K时，速率系数为1.3 × 10−13 cm 3 s−1。结果是通过一个完全的量子力学方法，使用完全从头计算分子数据。用光学势方法计算了入射Li（2s）+ H+通道的总辐射衰变截面，即辐射电荷转移和辐射缔合截面.辐射电荷转移占主导地位的辐射协会所考虑的碰撞能量，但直接的电荷转移将成为重要的在更高的能量。的发射光谱，它有一个峰值在158 nm附近的波长，由于辐射电荷转移给出了几个碰撞能量。锂离子化分数的早期宇宙的postrecombination时代的影响进行了讨论。
We present cross sections for the radiative charge transfer process Li(2s) + H+ → Li+(1s2) + H(1s)] + ℏω for collision energies between 0.1 meV and 10 eV and rate coefficients for temperatures between 10 and 40,000 K. At 300 K, the rate coefficient is 1.3 × 10−13 cm3 s−1. The results are obtained through a fully quantum-mechanical method using completely ab initio molecular data. Cross sections for the total collision-induced radiative decay, radiative charge transfer plus radiative association, from the entrance Li(2s) + H+ channel are calculated with the optical potential method. Radiative charge transfer dominates radiative association for the considered collision energies, but direct charge transfer will become important at higher energies. The emission spectrum, which has a peak at wavelengths near 158 nm, due to radiative charge transfer is given for several collision energies. Implications to the lithium ionization fraction in the postrecombination era of the early universe are discussed.