A semiempirical model for low energy electron–atom transport cross sections: The case of noble gases

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-09-01 DOI:10.1016/j.elspec.2024.147476

Felipe Arretche , Eliton P. Seidel , Wagner Tenfen

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Abstract

A semiempirical approach to describe low energy electron–atom transport cross sections of easy implementation and reproduction is presented. The heart of the model is an energy independent two-parameter potential that was adjusted to reproduce the accurate total cross sections for He, Ne, Ar and Kr, measured with a threshold photoelectron source technique from meV up to 20 eV. Once the potential was conceived, the model was validated by comparing the values obtained for the calculated scattering lengths and phase shifts with the respective quantities previously reported in the literature. We close the article by presenting the momentum transfer and viscosity cross sections. Good agreement is found when compared to the similar data obtained from swarm experiments, from phase shifts according to differential cross section measurements and to the cross sections reported by sophisticated ab initio relativistic many-body calculations. Tables for the phase shifts and cross sections are provided for direct use and applications.

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低能电子原子传输截面的半经验模型：惰性气体案例

本文提出了一种易于实施和再现的半经验方法来描述低能电子-原子传输截面。该模型的核心是一个与能量无关的双参数电势，通过调整该电势，可以再现利用阈值光电子源技术测量的 He、Ne、Ar 和 Kr 从 meV 到 20 eV 的精确总截面。一旦构思出电势，就可以将计算出的散射长度和相移值与以前文献中报道的相应数量进行比较，从而验证模型。最后，我们介绍了动量传递和粘性截面。通过与蜂群实验获得的类似数据、根据差分截面测量获得的相移以及通过复杂的相对论多体计算获得的截面进行比较，我们发现两者之间存在良好的一致性。为直接使用和应用提供了相移和截面表。

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来源期刊

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.