Theoretical Study of Electron Capture, Excitation, and Ionization Processes in H+−H(2l) Collisions

Y. Wang, K. Wang, L. Liu, Y. Wu, F. Wang, J. G. Wang
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Abstract

The processes of single-electron charge exchange, excitation, and ionization during proton impact on H(2l) are investigated. We employ two different theoretical methods that are suitable for different collision energy regions: the full quantum-mechanical molecular orbital close-coupling method for energies from 0.001 to 1 keV u−1 and the two-center atomic orbital close-coupling (TC-AOCC) method for energies between 0.3 and 100 keV u−1. For charge exchange and excitation processes, the total and nl-resolved cross sections to the final reaction channels of H (nl, n = 1–4) have been obtained over a broad energy region. Moreover, the ionization cross sections in the TC-AOCC calculation are also reported for both H(2s) and H(2p) initial target states. The present results are all compared with those from other sources when available. It is found that the magnitude and energy behavior of nl-resolved excitation cross sections for H+–H(2p) collisions are significantly distinct from those of the H(2s) initial state in the entire energy range considered, particularly in the low-energy region. The energy behaviors of the nl-resolved charge exchange cross sections from the H(2p) initial state are similar to those from the H(2s) initial state, but their magnitudes are larger. The present accurate cross-section data are anticipated to provide insight into the research of astrophysics and controlled fusion plasmas.
H+-H(2l) 碰撞中电子俘获、激发和电离过程的理论研究
研究了质子撞击 H(2l)时的单电子电荷交换、激发和电离过程。我们采用了适用于不同碰撞能量区域的两种不同理论方法:针对 0.001 至 1 keV u-1 能量的全量子力学分子轨道紧密耦合方法和针对 0.3 至 100 keV u-1 能量的双中心原子轨道紧密耦合(TC-AOCC)方法。对于电荷交换和激发过程,在一个宽广的能量区域内获得了 H(nl,n = 1-4)最终反应通道的总截面和 nl 分辨截面。此外,还报告了在 TC-AOCC 计算中 H(2s) 和 H(2p) 初始靶态的电离截面。这些结果都与其他来源(如有)的结果进行了比较。研究发现,在所考虑的整个能量范围内,特别是在低能区,H+-H(2p) 碰撞的 nl 分辨激发截面的大小和能量行为与 H(2s) 初始态的截面明显不同。来自 H(2p) 初始状态的 nl 分辨电荷交换截面的能量行为与来自 H(2s) 初始状态的电荷交换截面相似,但它们的量级更大。这些精确的截面数据有望为天体物理学和可控核聚变等离子体的研究提供启示。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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