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Cross sections for Monte Carlo simulations of positrons tracks in condensed matter

Speaker: 
Jan Franz
Start date: 
Wednesday, 12 February, 2020 - 11:00
Abstract: 
In the presentation we will discuss the computation of scattering cross sections for collisions of positrons with atoms and molecules. The motivation for this direction of research is the generation of data for Monte Carlo simulations of positron transport in condensed media. Such simulations are important in material science and medical applications, like positron emission tomography (see e. g. M. Dapor, Electron-Beam Iteractions with Solids: Applications of the Monte Carlo Method to Electron Scattering Problems, Springer-Verlag, Berlin (2010)). In more detail we will discuss two computational approaches. The first approach is based on the R-matrix method (e.g. J. Franz and M. Franz, Eur. Phys. J. D (2019) 73, 192). The second approach is based on density functional theory (see e.g. J. Franz, Eur. Phys. J. D (2019) 71, 44) in combination with the Volterra integration method (see e.g. J. Franz, J. Math. Phys. (2015) 56, 012104). The talk ends comparisons of our computed cross sections with experimental results.