Erlangen 2018 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 13: Low Pressure Plasmas - Poster
P 13.1: Poster
Dienstag, 6. März 2018, 16:15–18:15, Redoutensaal
Electron Impact Excitation of Xenon — •Dirk Luggenhölscher1, Uwe Czarnetzki1, Oleg Zatsarinny2, and Klaus Bartschat2 — 1Ruhr-Universität Bochum — 2Drake University, Iowa, USA
A novel experimental technique is applied to measure cross sections for electron-impact excitation of the 5p56p state of xenon from its 5p6 ground state. This is a complex collision system, for which benchmarking of theory against experiment is needed. The experiment is performed using ultrashort current pulses released from an electrode by femtosecond laser pulses with 80 MHz repetition rate. In order to minimize space charge effects, only about 104 electrons are generated in each pulse. Electrons are accelerated by a homogeneous electric field to energies of typically 250 eV. The fluorescence light (transition from 5p56p to 5p56s) generated after collisions with Xe atoms at low pressure (Pa range) is observed perpendicular to the electron beam direction and provides a direct image of the energy-dependent excitation cross section. The calculations were carried out with a fully relativistic and parallelized version of the B-spline R-matrix code [1], using a 75-state close-coupling model [2] with the target structure obtained earlier [3].
The work of OZ and KB is supported by the US NSF under
PHY-1403245, PHY-1520970, and XSEDE-090031.
O. Zatsarinny, Comp. Phys. Commun. 174 (2006) 273
O. Zatsarinny and K. Bartschat, J.Phys.B: At. Mol. Opt. Phys.43 (2010) 074031
O. Zatsarinny and K. Bartschat, Phys. Scr. T. 134 (2009) 014020