Hannover 2010 – wissenschaftliches Programm
P 2.9: Vortrag
Montag, 8. März 2010, 16:30–16:45, B 305
Improved self-energy calculations for pressure broadening of spectral lines in dense plasmas — •Sonja Lorenzen1, August Wierling1, Heidi Reinholz1,2, and Gerd Röpke1 — 1Institut für Physik, Universität Rostock, Deutschland — 2Institut für Theoretische Physik, Johannes Kepler Universität Linz, Österreich
Pressure broadening of Lyman-lines of hydrogen-like lithium (Li2+) is studied using a quantum statistical approach to the line shape in dense plasmas . The electronic self-energy, which is an important correlative effect, enters into the line profile calculations as a basic input. So far, we have neglected the effect of strong, i.e. close, electron-emitter collisions, but they play generally an important rôle in dense plasmas, as has already been shown by Griem in .
We present a method to calculate an improved electronic self-energy including strong collisions based on a two-body T-matrix and an effective optical potential including non-local exchange effects . The method is tested for level broadening of the ground state and the 2p state of hydrogen and compared to other T-matrix results . The implications for the Lyman lines of Li2+ are discussed, too.
 S. Lorenzen et al., Contrib. Plasma Phys. 48, 657 (2008)
 H. R. Griem, Spectral line broadening by plasmas (Academic Press, London, 1974)
 S. Lorenzen et al., to appear in Contrib. Plasma Phys., 50 (2010)
 S. Günter, Phys. Rev. E 48, 500 (1993)