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首页> 外文期刊>Physics of plasmas >Positron impact excitations of hydrogen atom embedded in weakly coupled plasmas: Formation of Rydberg atoms
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Positron impact excitations of hydrogen atom embedded in weakly coupled plasmas: Formation of Rydberg atoms

机译：嵌入弱耦合等离子体中的氢原子的正电子碰撞激发：里德堡原子的形成

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Formation of Rydberg atoms due to 1s -> nlm excitations of hydrogen, for arbitrary n, l, m, by positron impact in weakly coupled plasma has been investigated using a distorted-wave theory in the momentum space. The interactions among the charged particles in the plasma have been represented by Debye-Huckel potentials. Making use of a simple variationally determined wave function for the hydrogen atom, it has been possible to obtain the distorted-wave scattering amplitude in a closed analytical form. A detailed study has been made on the effects of plasma screening on the differential and total cross sections in the energy range 20-300 eV of incident positron. For the unscreened case, our results agree nicely with some of the most accurate results available in the literature. To the best of our knowledge, such a study on the differential and total cross sections for 1s -> nlm inelastic positron-hydrogen collisions for arbitrary n, l, m in weakly coupled plasmas is the first reported in the literature. (C) 2014 AIP Publishing LLC.
机译：在动量空间中使用了畸变波理论，研究了由于1s-> nlm激发氢而形成的Rydberg原子，对于弱耦合等离子体中的任意n，l，m均受到正电子的影响。等离子体中带电粒子之间的相互作用已由Debye-Huckel电势表示。利用氢原子的简单变化确定的波函数，就有可能以封闭的分析形式获得畸变波的散射幅度。等离子体筛查对入射正电子能量范围为20-300 eV的微分和总横截面的影响已进行了详细研究。对于未筛选的病例，我们的结果与文献中提供的一些最准确的结果非常吻合。据我们所知，对弱耦合等离子体中任意n，l，m的1s-> nlm非弹性正电子-氢碰撞的微分截面和总截面的研究是文献首次报道。 （C）2014 AIP Publishing LLC。

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