Compact Fitting Formulas for Electron-Impact Cross Sections

Compact fitting formulas, which contain four fitting constants, are presented for electron-impact excitation and ionization cross sections of atoms and ions. These formulas can fit experimental and theoretical cross sections remarkably well, when resonant structures are smoothed out, from threshold...

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Detalles Bibliográficos
Autor principal: Kim, Yong-Ki
Formato: Online Artículo Texto
Lenguaje:English
Publicado: [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology 1992
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4909190/
https://www.ncbi.nlm.nih.gov/pubmed/28053452
http://dx.doi.org/10.6028/jres.097.032
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author Kim, Yong-Ki
author_facet Kim, Yong-Ki
author_sort Kim, Yong-Ki
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description Compact fitting formulas, which contain four fitting constants, are presented for electron-impact excitation and ionization cross sections of atoms and ions. These formulas can fit experimental and theoretical cross sections remarkably well, when resonant structures are smoothed out, from threshold to high incident electron energies (< 10 keV), beyond which relativistic formulas are more appropriate. Examples of fitted cross sections for some atoms and ions are presented. The basic form of the formula is valid for both atoms and molecules.
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spelling pubmed-49091902017-01-04 Compact Fitting Formulas for Electron-Impact Cross Sections Kim, Yong-Ki J Res Natl Inst Stand Technol Article Compact fitting formulas, which contain four fitting constants, are presented for electron-impact excitation and ionization cross sections of atoms and ions. These formulas can fit experimental and theoretical cross sections remarkably well, when resonant structures are smoothed out, from threshold to high incident electron energies (< 10 keV), beyond which relativistic formulas are more appropriate. Examples of fitted cross sections for some atoms and ions are presented. The basic form of the formula is valid for both atoms and molecules. [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology 1992 /pmc/articles/PMC4909190/ /pubmed/28053452 http://dx.doi.org/10.6028/jres.097.032 Text en https://creativecommons.org/publicdomain/zero/1.0/ The Journal of Research of the National Institute of Standards and Technology is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright.
spellingShingle Article
Kim, Yong-Ki
Compact Fitting Formulas for Electron-Impact Cross Sections
title Compact Fitting Formulas for Electron-Impact Cross Sections
title_full Compact Fitting Formulas for Electron-Impact Cross Sections
title_fullStr Compact Fitting Formulas for Electron-Impact Cross Sections
title_full_unstemmed Compact Fitting Formulas for Electron-Impact Cross Sections
title_short Compact Fitting Formulas for Electron-Impact Cross Sections
title_sort compact fitting formulas for electron-impact cross sections
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4909190/
https://www.ncbi.nlm.nih.gov/pubmed/28053452
http://dx.doi.org/10.6028/jres.097.032
work_keys_str_mv AT kimyongki compactfittingformulasforelectronimpactcrosssections

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