Plasma pressure broadening for few-electron emitters including strong electron collisions within a quantum-statistical theory
dc.contributor.author | Lorenzen, S. | |
dc.contributor.author | Omar, B. | |
dc.contributor.author | Zammit, Mark | |
dc.contributor.author | Fursa, Dmitry | |
dc.contributor.author | Bray, Igor | |
dc.date.accessioned | 2017-01-30T13:07:53Z | |
dc.date.available | 2017-01-30T13:07:53Z | |
dc.date.created | 2014-04-10T20:00:51Z | |
dc.date.issued | 2014 | |
dc.identifier.citation | Lorenzen, Sonja and Omar, Banaz and Zammit, Mark C. and Fursa, Dmitry V. and Bray, Igor. 2014. Plasma pressure broadening for few-electron emitters including strong electron collisions within a quantum-statistical theory. Physical Review E. 89 (2): pp. 1-13. | |
dc.identifier.uri | http://hdl.handle.net/20.500.11937/28847 | |
dc.identifier.doi | 10.1103/PhysRevE.89.023106 | |
dc.description.abstract |
To apply spectroscopy as a diagnostic tool for dense plasmas, a theoretical approach to pressure broadening is indispensable. Here, a quantum-statistical theory is used to calculate spectral line shapes of few-electron atoms. Ionic perturbers are treated quasistatically as well as dynamically via a frequency fluctuation model. Electronic perturbers are treated in the impact approximation. Strong electron-emitter collisions are consistently taken into account with an effective two-particle T-matrix approach. Convergent close-coupling calculations give scattering amplitudes including Debye screening for neutral emitters. For charged emitters, the effect of plasma screening is estimated. The electron densities considered reach up to ne=1027 m-3. Temperatures are between T=104 and 105 K. The results are compared with a dynamically screened Born approximation for Lyman lines of H and H-like Li as well as for the He 3889 Å line. For the last, a comprehensive comparison to simulations and experiments is given. For the H Lyman-a line, the width and shift are drastically reduced by the Debye screening. In the T-matrix approach, the line shape is notably changed due to the dependence on the magnetic quantum number of the emitter, whereas the difference between spin-scattering channels is negligible. | |
dc.publisher | The American Physical Society | |
dc.title | Plasma pressure broadening for few-electron emitters including strong electron collisions within a quantum-statistical theory | |
dc.type | Journal Article | |
dcterms.source.volume | 89 | |
dcterms.source.number | 2 | |
dcterms.source.startPage | 1 | |
dcterms.source.endPage | 13 | |
dcterms.source.issn | 1539-3755 | |
dcterms.source.title | Physical Review E | |
curtin.department | ||
curtin.accessStatus | Fulltext not available |