Evaluation of screening length corrections for interaction potentials in impact-collision ion scattering spectroscopy

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• 作者：Wataru Takeuchi
• 关键词：Ion&ndash ; solid interactions ; Low-energy ion scattering (LEIS) ; Impact-collision ion scattering spectroscopy (ICISS) ; Shadowing effect ; Shadow cone ; Screening length
• 刊名：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
• 出版年：2013
• 出版时间：15 October, 2013
• 年：2013
• 卷：313
• 期：Complete
• 页码：33-39
• 全文大小：603 K

文摘

Since in impact-collision ion scattering spectroscopy (ICISS) data analysis the interaction potential represented by the screening length as the screening effect is not satisfactorily established up to the present, we introduce commonly the correction factor in the screening length. Previously, Yamamura, Takeuchi and Kawamura (YTK) have suggested the theory taking the shell effect of electron distributions into account for the correction factor to Firsov screening length in the Moliere potential. The application of YTK theory to the evaluation of screening length corrections for the interaction potentials in ICISS manifested that the screening length corrections calculated by the YTK theory agree almost with those determined by simulations or numerical calculations in ICISS and its variants data analyses, being superior to the evaluation of screening length corrections with the O¡¯Connor and Biersack (OB) formula.