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Electron capture, excitation and ionization in He2+–H and H+–He+ collisions

J Faulkner, I B Abdurakhmanov, Sh U Alladustov, A S Kadyrov, I Bray2019年Plasma Physics and Controlled FusionIF 2.2出版社

The wave-packet convergent close-coupling method has been applied to model electron capture, excitation and ionization processes in He2+–H and H+–He+ collisions. These processes constitute all possible reactions taking place in a three-body system of an α particle, a proton and an electron but corresponding to two different initial states. We present systematic and convergent calculations of nl-resolved cross sections required for plasma modeling and diagnostics. The presented results are largest and most accurate to date. The integrated cross sections for electron capture, excitation and ionization show generally good agreement with experimental measurements and previous close-coupling calculations where available, however the calculated cross section for Balmer-α emission in He2+–H collisions significantly disagree with experiment. We also present the fully differential, as well as various doubly and singly differential cross sections for ionization in He2+–H collisions at an incident energy of 200 keV amu−1.

日本語訳

波動パケット収束閉合(close-coupling)法を適用し、He2+–HおよびH+–He+衝突における電子捕獲、励起、および電離過程のモデル化を行った。これらの過程は、α粒子、陽子、および電子からなる三体系において起こり得るすべての反応を構成するが、それぞれ異なる二つの初期状態に対応する。我々は、プラズマモデリングおよび診断に必要とされる、nl分解断面積の系統的な計算結果を提示する。提示する結果は、これまでで最も大規模かつ高精度なものである。電子捕獲、励起、および電離の積分断面積は、実験測定値および既存の収束閉合計算結果と概ね良好な一致を示す。しかしながら、He2+–H衝突におけるバルマーα発光の計算断面積は、実験値と有意に乖離する。さらに我々は、200 keV amu−1の入射エネルギーにおけるHe2+–H衝突の電離について、完全微分断面積に加え、様々な二重微分および単一微分断面積も提示する。

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