Quantum-statistical line shape calculation for Lyman-a lines in dense H plasmas

We present results for the Lyman-a line of hydrogen in dense plasmas. Full line profiles are calculated within a quantum-statistical method, based on thermodynamic Green's functions. The contributions of plasma ions and electrons are considered separately. Linear and quadratic Stark effect as w...

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Main Authors:	Lorenzen, S., Wierling, A., Reinholz, H., Röpke, G., Zammit, Mark, Fursa, Dmitry, Bray, Igor
Format:	Conference Paper
Published:	2012
Online Access:	http://hdl.handle.net/20.500.11937/38307

id	curtin-20.500.11937-38307
recordtype	eprints
spelling	curtin-20.500.11937-383072017-09-13T14:10:12Z Quantum-statistical line shape calculation for Lyman-a lines in dense H plasmas Lorenzen, S. Wierling, A. Reinholz, H. Röpke, G. Zammit, Mark Fursa, Dmitry Bray, Igor We present results for the Lyman-a line of hydrogen in dense plasmas. Full line profiles are calculated within a quantum-statistical method, based on thermodynamic Green's functions. The contributions of plasma ions and electrons are considered separately. Linear and quadratic Stark effect as well as quadrupole effects are taken into account for ions. The model microfield method is used to include ion dynamics. The focus of this work lies on the contribution to broadening and shift by free electrons beyond the Born approximation. The effect of strong collisions can be identified as ladder-like diagrams of the electron-emitter propagator. In an effective two-particle approximation, the electronic self-energy is given in terms of scattering amplitudes, analogous to Baranger's expressions [Baranger, M 1958 Phys. Rev. 112 855]. We obtained scattering amplitudes from convergent close-coupling calculations including medium effects via Debye screening. Additionally, the electronic coupling between initial and final states is taken care of by a vertex correction. In our examples, the free electron density ranges between 1023 and 10 25 m-3 at a plasma temperature of 1 and 2 eV, respectively. 2012 Conference Paper http://hdl.handle.net/20.500.11937/38307 10.1088/1742-6596/397/1/012021 unknown
repository_type	Digital Repository
institution_category	Local University
institution	Curtin University Malaysia
building	Curtin Institutional Repository
collection	Online Access
description	We present results for the Lyman-a line of hydrogen in dense plasmas. Full line profiles are calculated within a quantum-statistical method, based on thermodynamic Green's functions. The contributions of plasma ions and electrons are considered separately. Linear and quadratic Stark effect as well as quadrupole effects are taken into account for ions. The model microfield method is used to include ion dynamics. The focus of this work lies on the contribution to broadening and shift by free electrons beyond the Born approximation. The effect of strong collisions can be identified as ladder-like diagrams of the electron-emitter propagator. In an effective two-particle approximation, the electronic self-energy is given in terms of scattering amplitudes, analogous to Baranger's expressions [Baranger, M 1958 Phys. Rev. 112 855]. We obtained scattering amplitudes from convergent close-coupling calculations including medium effects via Debye screening. Additionally, the electronic coupling between initial and final states is taken care of by a vertex correction. In our examples, the free electron density ranges between 1023 and 10 25 m-3 at a plasma temperature of 1 and 2 eV, respectively.
format	Conference Paper
author	Lorenzen, S. Wierling, A. Reinholz, H. Röpke, G. Zammit, Mark Fursa, Dmitry Bray, Igor
spellingShingle	Lorenzen, S. Wierling, A. Reinholz, H. Röpke, G. Zammit, Mark Fursa, Dmitry Bray, Igor Quantum-statistical line shape calculation for Lyman-a lines in dense H plasmas
author_facet	Lorenzen, S. Wierling, A. Reinholz, H. Röpke, G. Zammit, Mark Fursa, Dmitry Bray, Igor
author_sort	Lorenzen, S.
title	Quantum-statistical line shape calculation for Lyman-a lines in dense H plasmas
title_short	Quantum-statistical line shape calculation for Lyman-a lines in dense H plasmas
title_full	Quantum-statistical line shape calculation for Lyman-a lines in dense H plasmas
title_fullStr	Quantum-statistical line shape calculation for Lyman-a lines in dense H plasmas
title_full_unstemmed	Quantum-statistical line shape calculation for Lyman-a lines in dense H plasmas
title_sort	quantum-statistical line shape calculation for lyman-a lines in dense h plasmas
publishDate	2012
url	http://hdl.handle.net/20.500.11937/38307
first_indexed	2018-09-06T22:44:49Z
last_indexed	2018-09-06T22:44:49Z
_version_	1610899930005635072

Quantum-statistical line shape calculation for Lyman-a lines in dense H plasmas

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