Kiel 2011 – scientific programme
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P: Fachverband Plasmaphysik
P 18: Poster: Theorie/Simulation dichter und stark gekoppelter Plasmen
P 18.2: Poster
Wednesday, March 30, 2011, 16:30–18:30, Foyer
Quantum-statistical T-matrix approach to line broadening of hydrogen in dense plasmas — •Sonja Lorenzen1, Yiling Chen1, August Wierling1, Heidi Reinholz1,2, Gerd Röpke1, Mark C. Zammit3, Dmitry V. Fursa3, and Igor Bray3 — 1Institute of Physics, University of Rostock, 18051 Rostock, Germany — 2Institute for Theoretical Physics, Johannes Kepler University Linz, 4040 Linz, Austria — 3Institute of Theoretical Physics, Curtin University of Technology, Perth WA 6845, Australia
Pressure broadening of spectral lines due to plasma electrons and ions can be used as a diagnostic tool to determine temperature and electron density of a dense plasma. Here, a quantum-statistical theory, based on thermodynamic Green’s functions, is used to calculate hydrogen Lyman lines. The electronic self-energy Σe is an important input in this theory. It describes the influence of plasma electrons on bound state properties. In dense plasmas, the effect of strong, i.e. close, electron-emitter collisions can be considered by three-particle T-matrix diagrams. These diagrams are approximated with the help of an effective two-particle T-matrix, which is obtained from convergent close-coupling calculations with Debye screening, and results are compared with other theories.