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Electron impact inner-shell atomic ionization cross-section measurement

Grant number: 10/03159-2
Support type:Scholarships in Brazil - Master
Effective date (Start): August 01, 2010
Effective date (End): July 31, 2012
Field of knowledge:Physical Sciences and Mathematics - Physics - Atomic and Molecular Physics
Principal researcher:Vito Roberto Vanin
Grantee:Viktor Jahnke
Home Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

The electron impact inner-shell atomic ionization cross section in high-Z atoms will be measured in the Microtron 1.8 MeV electron beam line, already being installed, using a semiconductor X-ray detector. In the 2 MeV energy region, experimental data for heavy atoms are scarce, despite the relevance of this process in the electron transport through the production of secondary electrons in the high-energy end of the spectrum and photons. The essentials of the process can be explained with Feynman diagrams, but a detailed description requires a proper atomic model and Dirac´s equation for the electron propagation.

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