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|Type:||Artigo de periódico|
|Title:||Many-body Theory Of Electron Scattering By Excited Atomic Targets: Fundamental Formulas|
Da Paix F.J.
|Abstract:||A many-body theory of electron-impact excitation out of excited atomic states is presented. After the fundamental equations and formulas of the general theory are given, first- and second-order approximations are introduced. In the case of the first-order theory, detailed analytical formulas are also developed. The physical interpretation of the first- and second-order theories are presented with the aid of Feynman-type diagrams. Following a discussion of initial- and final-state effects, the many-body theory is also related to the distorted-wave approximation. © 1993 The American Physical Society.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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