Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Spiros Alexiou"'
Publikováno v:
Atoms, Vol 12, Iss 4, p 19 (2024)
Spectral line shapes code in plasmas (SLSPs) code comparison workshops have been organized in the last decade with the aim of comparing the spectra obtained with independently developed analytical and numerical models. Here, we consider the simultane
Externí odkaz:
https://doaj.org/article/c3e37b7328c84f4f820a4915a57a7ca5
Autor:
Spiros Alexiou
Publikováno v:
Atoms, Vol 12, Iss 3, p 17 (2024)
The present paper discusses a number of topics relevant to line broadening in the presence of periodic oscillatory fields. Specifically, we discuss the applicablility of the expression usually employed to compute the autocorrelation function, the dre
Externí odkaz:
https://doaj.org/article/b63a455984ea42a69da5ef98d05a306f
Autor:
Spiros Alexiou
Publikováno v:
Atoms, Vol 11, Iss 11, p 141 (2023)
It has been recently suggested that white dwarf diagnostics could be in error and should be revised because of the effect of the magnetic field on spiralling trajectories of the plasma particles (mainly electrons), predicting a dramatic width increas
Externí odkaz:
https://doaj.org/article/eba8a021d25e4c61a73479c363727d90
Autor:
Spiros Alexiou
Publikováno v:
Atoms, Vol 11, Iss 2, p 29 (2023)
It has been claimed that recent experiments using high-powered lasers have identified dip structures in spectral line profiles in plasmas and that these were successfully used to reliably infer both plasma parameters and information on high and low-f
Externí odkaz:
https://doaj.org/article/33f524e56601441cadebe3480f9a9d04
Autor:
Spiros Alexiou
Publikováno v:
Atoms, Vol 9, Iss 2, p 30 (2021)
Line broadening is usually dominated by interactions of an atomic system with a stochastic, random medium. When, in addition to the random medium, a non-random field (such as a laser) is applied, the line profile may be modified in significant ways.
Externí odkaz:
https://doaj.org/article/e480cd21f48b4d3d936e8f66b8a81a12
Autor:
Sandrine Ferri, Annette Calisti, Caroline Mossé, Joël Rosato, Bernard Talin, Spiros Alexiou, Marco A. Gigosos, Manuel A. González, Diego González-Herrero, Natividad Lara, Thomas Gomez, Carlos Iglesias, Sonja Lorenzen, Roberto C. Mancini, Evgeny Stambulchik
Publikováno v:
Atoms, Vol 2, Iss 3, Pp 299-318 (2014)
Modeling the Stark broadening of spectral lines in plasmas is a complex problem. The problem has a long history, since it plays a crucial role in the interpretation of the observed spectral lines in laboratories and astrophysical plasmas. One difficu
Externí odkaz:
https://doaj.org/article/4238d220a6cd43d79df9805dc58c54a6
Autor:
Spiros Alexiou, Milan S. Dimitrijević, Sylvie Sahal-Brechot, Evgeny Stambulchik, Bin Duan, Diego González-Herrero, Marco A. Gigosos
Publikováno v:
Atoms, Vol 2, Iss 2, Pp 157-177 (2014)
In this work, we briefly summarize the theoretical aspects of isolated line broadening. We present and discuss test run comparisons from different participating lineshape codes for the 2s-2p transition for LiI, B III and NV.
Externí odkaz:
https://doaj.org/article/270d5533c3d442149e94fc67ef5a7793
Autor:
Spiros Alexiou
Publikováno v:
Atoms, Vol 7, Iss 4, p 94 (2019)
In a previous paper, a variation of the Collision-time Statistics method was applied to identify the relevant perturbers for line broadening under the action of a constant magnetic field. As discussed, that version was simplified and inadequate for l
Externí odkaz:
https://doaj.org/article/4a3bc27fb615425b99fd7041661d485d
Autor:
Spiros Alexiou
Publikováno v:
Atoms, Vol 7, Iss 2, p 52 (2019)
In recent work, the effect of a magnetic field on the line shapes via the modification of electron perturber trajectories was considered. In the present paper we revisit this idea using a variation of the Collision-time Statistics method, in order to
Externí odkaz:
https://doaj.org/article/0cffcaea515840c1b483d26cc16373ee
Autor:
Sylvie Sahal-Bréchot, Evgeny Stambulchik, Milan S. Dimitrijević, Spiros Alexiou, Bin Duan, Véronique Bommier
Publikováno v:
Atoms, Vol 6, Iss 2, p 30 (2018)
The purpose of the Spectral Line Shapes in Plasmas (SLSP) code comparison workshop is to compare different computational and analytical methods, in order to pinpoint sources of disagreements, infer limits of applicability, and assess accuracy. The pr
Externí odkaz:
https://doaj.org/article/e2f5887c0e0247b7a43b2adc36f6d6c7