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arXiv 0904.1844physics.atm-clusphysics.atom-ph
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双壳层富勒烯中原子的光电离

Photoionization of atoms stuffed inside a two-shell fullerene

M. Ya. Amusia, L. V. Chernysheva, E. Z. Liverts

摘要:

本文研究了两壳层内核A@CN 1@CN 2的光电离。公式的横截面和角各向异性参数,偶极和非偶极。用两个零厚度的“泡势”代替富勒烯的作用,考虑了富勒烯壳层对A原子光电子的影响。假设外层半径R2比内层半径R1大得多,并且两者都远远超过原子半径r,则包括富勒烯壳层极化。这允许通过CN 1、N2极化率来表达该效应,CN 1、N2极化率与它们的光电离截面相关联。在随机相位近似(RPA)中考虑了壳层CN 1和CN 2之间的相互作用。光电子散射的效果,由两个“泡势”包括在最低阶和RPA框架。作为具体例子,考虑两个内面Ar@C60@C240和Xe@C60@C240。在第一种情况下,我们考虑3p和3s,而在第二种情况下,5p,5s和4d子壳。发现了一系列新的特性,值得实验验证。

英文摘要:

The photoionization of a two-shell endohedral A@CN1@CN2 is considered. Formulas are presented for cross-sections and angular anisotropy parameters, both dipole and non-dipole. The effect of the fullerenes shell upon photoelectron from atom A is taken into account substituting the action of the fullerene by two zero-thickness "bubble potential". The fullerenes shells polarization is included assuming that the radius of the outer shell R2 is much bigger than the inner R1 and both much exceeds the atomic radius r. This permits to express the effect via CN1,N2 polarizabilities, which are connected to their photoionization cross-sections. The interaction between shells CN1 and CN2 is taken into account in the Random Phase Approximation (RPA). The effect of photoelectron scattering by both "bubble potentials" is included in the lowest order and in the RPA frame. As concrete examples, two endohedrals Ar@C60@C240 and Xe@C60@C240 are considered. In the first case we consider 3p and 3s, while in the second 5p, 5s and 4d subshells. A whole variety of new peculiarities are found that deserve experimental verification.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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