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Electron emission from fluorene (C13H10) upon 3.5 MeV/u Si8+ ion impact: double differential distributions
Journal of Physics B: Atomic, Molecular and Optical Physics ( IF 1.6 ) Pub Date : 2021-08-27 , DOI: 10.1088/1361-6455/ac1a1e
Chandan Bagdia 1 , Anuvab Mandal 1 , Madhusree Roy Chowdhury 1 , Shamik Bhattacharjee 1 , M Nrisimha Murty 1 , Deepankar Misra 1 , Christophe Champion 2 , Lszl Gulys 3 , Philippe F Weck 4 , Lokesh C Tribedi 1
Affiliation  

We have studied the electron emission from one of the polycyclic aromatic hydrocarbon (PAH) molecules namely, fluorene (C13H10), upon 3.5 MeV/u Si8+ ion impact. The experimentally measured absolute double differential cross sections (DDCS) are compared with the continuum distorted wave-eikonal initial state (CDW-EIS) model and the first Born approximation including correct boundary conditions (CB1). The measurements are carried out in the ejected e-energy range of 1 eV–400eV and in the angular range of 20–160. We have obtained the single differential and the total cross sections (TCSs) of e-emission as well. The CB1 calculation largely underestimates the data. The CDW-EIS model, which is applied for the PAH molecule for the first time, provides an overall better agreement with the double differential, single differential and TCS data. The DDCS data for fluorene has also been compared with that for CH4 molecule, at a few angles. The forward–backward angular asymmetry shows a relatively flatter distribution compared to the theoretical predictions. The contribution due to the giant plasmon resonance could not be clearly observed except a mild indication in the asymmetry parameter. The angular distribution of the carbon KLL Auger electron cross section shows certain variations. The study of the KLL hyper-satellite component indicates the double K-ionization cross section is about 8.6% of the single K-ionization one.



中文翻译:

芴 (C13H10) 在 3.5 MeV/u Si8+ 离子冲击下的电子发射:双微分分布

我们研究了多环芳烃 (PAH) 分子之一,即芴 (C 13 H 10 ) 在 3.5 MeV/u Si 8+离子冲击下的电子发射。将实验测量的绝对双微分横截面 (DDCS) 与连续谱扭曲波-本征初始状态 (CDW-EIS) 模型和包括正确边界条件 (CB1) 的第一个 Born 近似进行比较。测量是在1 eV–400eV 的发射e -能量范围和 20–160 的角度范围内进行的。我们已经获得了 e -的单微分和总横截面(TCS)-发射也是如此。CB1 计算在很大程度上低估了数据。首次应用于 PAH 分子的 CDW-EIS 模型与双微分、单微分和 TCS 数据提供了更好的整体一致性。芴的 DDCS 数据也与 CH 4 的数据进行了比较分子,在几个角度。与理论预测相比,前后角不对称显示出相对平坦的分布。除了不对称参数的轻微指示外,无法清楚地观察到巨等离子共振的贡献。碳 KLL 俄歇电子截面的角度分布显示出一定的变化。对 KLL 超卫星分量的研究表明,双 K 电离截面约为单 K 电离截面的 8.6%。

更新日期:2021-08-27
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