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Improved Self‐Energy Calculations for Pressure Broadening of Spectral Lines in Dense Plasmas
Author(s) -
Lorenzen S.,
Wierling A.,
Reinholz H.,
Röpke G.
Publication year - 2011
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201010104
Subject(s) - plasma , physics , atomic physics , line (geometry) , spectral line , lithium (medication) , energy (signal processing) , ground state , hydrogen , self energy , computational physics , quantum mechanics , electron , medicine , geometry , mathematics , endocrinology
Pressure broadening of Lyman‐lines of hydrogen‐like lithium (Li 2+ ) has been studied using a quantum statistical approach to the line shape in dense plasmas, for details see [1]. In this communication, we concentrate on the electronic self‐energy, which is a basic input to the theory of spectral line profiles. We discuss the effect of strong, i.e. close, collisions which have been neglected so far for Li 2+ plasmas, but play generally an important role in dense plasmas, as has been shown in [2]. 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. The method is tested for level broadening of the ground state of hydrogen (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)