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首页> 外文期刊>Atomic data and nuclear data tables >Cross sections for collision processes of Li atoms interacting with electrons, protons, multiply charged ions, and hydrogen molecules
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Cross sections for collision processes of Li atoms interacting with electrons, protons, multiply charged ions, and hydrogen molecules

机译：Li原子与电子，质子，多电荷离子和氢分子相互作用的碰撞过程的横截面

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The available experimental and theoretical cross section data for collision processes of Li atoms in the ground state and excited (up to n = 3) states with electrons, protons, and multiply charged ions have been collected and critically assessed. The electron-impact processes include excitation from the ground state, transitions between excited states with n = 2, 3, and ionization from all states considered. The heavy-particle-impact processes include excitation, ionization (for the proton case), and electron removal (the sum of ionization and electron capture). Well-established cross section scaling relationships have been used to generate the cross sections for processes for which no information was found in the literature. This approach was particularly extensively used for the collision processes involving excited Li states, and for collisions with protons and multiply charged ions. In addition, available data for collision processes of Li atoms and ions with neutral hydrogen molecules are shown. The ''recommended'' cross sections for the considered processes, generated either by critical assessment of available data or by a scaling procedure, have been fitted to simple analytic expressions which ensure correct asymptotic behavior of the cross sections. These recommended cross sections are presented by giving their analytic-fit expressions and tabulating the values of the parameters entering these analytic fits. For those reactions from the ground state for which there is a significant amount of cross section information, we also present the recommended cross sections in graphical form together with the cross section data used for their generation. The criteria for assessing the accuracy of the experimental data, theoretical calculations, and procedures used in determining the recommended cross sections are discussed. (C) 1997 Academic Press.
机译：已收集并严格评估了锂原子在基态和激发态（最多n = 3）与电子，质子和多电荷离子碰撞过程中可获得的实验和理论截面数据。电子撞击过程包括从基态激发，n = 2、3的激发态之间的跃迁以及从所有考虑的态电离。重粒子撞击过程包括激发，电离（对于质子而言）和电子去除（电离与电子俘获之和）。完善的横截面缩放比例关系已用于生成过程的横截面，而文献中未找到有关该过程的信息。这种方法特别广泛地用于涉及激发Li状态的碰撞过程，以及与质子和多电荷离子的碰撞。另外，显示了锂原子和离子与中性氢分子碰撞过程的可用数据。通过对可用数据进行严格评估或通过缩放程序生成的所考虑过程的“推荐”横截面，已与简单的解析表达式相匹配，以确保横截面的正确渐近行为。这些推荐的横截面通过给出其解析拟合表达式并将输入这些解析拟合的参数的值制成表格来呈现。对于那些具有大量横截面信息的基态反应，我们还以图形形式显示推荐的横截面以及用于生成它们的横截面数据。讨论了评估实验数据，理论计算和确定推荐横截面所用程序准确性的标准。 （C）1997学术出版社。

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