{"term":{"id":"09382","title":"scattered-ion energy","longtitle":"IUPAC Gold Book - scattered-ion energy","doi":"10.1351\/goldbook.09382","code":"09382","status":"current","definitions":[{"id":1,"text":"Kinetic energy of a primary ion after a collision.","notes":{"1":"Following binary elastic scattering, the kinetic energy of the primary or probe ions, \\(E_{\\rm{s}}\\), is given by \\(E_{\\rm{s}} = E_{0}[M_{0}\/(M_{0} + M_{1})]^{2} \\{\\cos\\theta + [(M_{0}\/M_{1})^{2} - \\sin^{2}\\theta]^{½}\\}^{2}\\) where \\(E_{0}\\) is the kinetic energy of the incident probe ion prior to scattering; \\(M_{0}\\) is the mass of the probe ion; \\(M_{1}\\) is the mass of the target atom; \\(\\theta\\) is the angle between the initial and final velocity vectors for the probe ion, as determined from a common origin in the laboratory coordinate system, expressed as a value between \\(\\pu{0\\!^{\\circ}}\\) and \\(\\pu{180\\!^{\\circ}}\\)."},"links":[{"term":"primary ion","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/09414"},{"term":"probe ions","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/09378"}],"sources":["PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1835 (https:\/\/doi.org\/10.1515\/pac-2019-0404)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/09382\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/09382\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/09382\/plain"},"citation":"Citation: 'scattered-ion energy' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351\/goldbook.09382","license":"The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https:\/\/creativecommons.org\/licenses\/by-sa\/4.0\/) for individual terms.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","disclaimer":"The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.","accessed":"2026-04-18T16:05:59+00:00"}}