H+2 处 keV 光子康普顿散射的干涉效应:非相对论分析方法

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
M. Dieng, H. Bachau
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引用次数: 0

摘要

在本文中,我们研究了分子在康普顿散射中受到 keV 光子的干涉影响。作为试验案例,我们研究了处于平衡核间距和解离通道的分子体系 H2+。初始分子波函数被描述为以每个原子核为中心的原子轨道的线性组合。最终的连续态是双中心连续库仑波函数。利用这些近似值,我们得到了康普顿散射全二阶截面的解析形式。我们研究了入射光子能量接近 2.1 keV 时,不同核间距下的分子影响。我们讨论了康普顿散射量级中 A⋅P 和 A2 耦合项的相对贡献(其中 P 为电子动量算子,A 为场的矢量势)。我们将重点放在科恩-法诺(Cohen-Fano)型干涉效应上,就像在分子光离子化中观察到的那样。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Interference effects in Compton scattering of keV photons at H+2 : a nonrelativistic analytical approach
In this paper we study interference effects in Compton scattering at molecule by keV photons. As a test case we investigate the molecular system H2+ at the equilibrium internuclear distance and in the dissociative channel. The initial molecular wavefunction is described as a linear combination of atomic orbitals centered on each nucleus. The final continuum state is a two-centre continuum Coulomb wavefunction. Using these approximations, we obtain an analytical form for the Compton scattering fully differential cross section. We investigate the molecular effects at various internuclear distance for an incident photon energy close to 2.1 keV. The relative contribution of the A⋅P and A2 coupling terms in the Compton scattering magnitude is discussed (where P is the electron momentum operator and A the vector potential of the field). We focus on Cohen-Fano type interference effects, as the ones observed in the photoionization of molecules.
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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