Simulation of shifted and asymmetric hydrogen line profiles

Abstract:

A theoretical approach to spectral line shapes of hydrogen-like emitters in plasmas has been developed. Within this approach, the line core as well as the line wings are well described. Besides the ion dynamics, shift and asymmetry are also included. The time evolution of the ionic microfield is taken into account by means of a simulation technique. Shift and asymmetry of the lines result from the inclusion of the electronic contributions to the line shift as well as from the inhomogeneities of the ionic microfield and the quadratic Stark effect. Calculated line profiles according to the presented formalism are given for the Lyman- line and the Lyman- line of atomic hydrogen in an argon plasma, and compared with results of other theories and corresponding experiments.