Results 61 to 70 of about 162 (82)
Physical Review E, 2004 A model is presented where the level-population densities in quasi-steady-state hot dense plasmas are described by means of large nonrelativistic superconfigurations (SC's), whose configuration populations follow a decreasing-exponential law versus energy (Boltzmann like) for a temperature depending on the SC.
C. Bauche-Arnoult +2 more
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A superconfiguration model for broadband spectroscopy of non-LTE plasmas
Journal of Physics B: Atomic, Molecular and Optical Physics, 2000 We present an atomic physics package called AVERROES/TRANSPEC for studying plasma spectroscopy of complex L-, M-shell emitters or even core-excited multielectron K-shell emitters. The model, which is also intended to give some insights on ionization properties of M-shell ionized plasmas, is divided into two parts.
O. Peyrusse
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Analysis of a non-LTE xenon spectrum by means of the model of superconfiguration temperatures
Journal of Quantitative Spectroscopy and Radiative Transfer, 2003 Abstract The method of superconfiguration (SC) temperatures is used for interpreting the experimental spectrum of a non-LTE xenon plasma with kT e =450 eV and n e =1.2×10 20 cm −3 . 109 SCs are selected for representing the eight relevant ions. The coefficients of the linear equations for the populations and
C. Bauche-Arnoult +6 more
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Quantum mechanical model for the study of pressure ionization in the superconfiguration approach
Journal of Physics A: Mathematical and General, 2006 The knowledge of plasma equation of state and photoabsorption requires suitable and realistic models for the description of ions. The number of relevant electronic configurations of ions in hot dense plasmas can be immense (increasing with atomic number Z).
G. Dejonghe +2 more
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Superconfigurations and Super Transition Arrays
, 2015 This chapter is a continuation of Chap. 6 in the sense that, for very complex ions, not only the number of levels is overwhelmingly large, but also the number of configurations. The concept of superconfiguration has been introduced for a proper gathering of configurations through the definition of supershells (collections of ordinary subshells).
Jacques Bauche +2 more
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Variational theory of average-atom and superconfigurations in quantum plasmas
Physical Review E, 2007 Models of screened ions in equilibrium plasmas with all quantum electrons are important in opacity and equation of state calculations. Although such models have to be derived from variational principles, up to now existing models have not been fully variational.
Bogdan Cichocki, Thomas Blenski
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Non-LTE superconfiguration collisional radiative model
Journal of Quantitative Spectroscopy and Radiative Transfer, 1997 Abstract We have developed a non-LTE collisional radiative model which takes into account the overwhelming multiplicity of excited levels of heavy elements in hot and dense plasmas. The model, ‘SCROLL’ (Super Configuration Radiative cOLLisional), treats superconfigurations as effective levels and reproduces detailed configuration accounting results ...
J. Oreg, A. Bar-Shalom, M. Klapisch
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Further stable methods for the calculation of partition functions in the superconfiguration approach
Physical Review E, 2007 The extension to recursion over holes of the Gilleron and Pain method for calculating partition functions of a canonical ensemble of noninteracting bound electrons is presented as well as a generalization for the efficient computation of collisional line broadening.
Brian G. Wilson +2 more
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Journal of Quantitative Spectroscopy and Radiative Transfer, 2001 Abstract VirtualSpectro a post-processor that has the possibility of dealing with complex spectra by using superconfigurations (SC) as basis is described. The atomic data are extracted from SCROLL. In the coupling between the two codes, several problems were encountered: the SC basis set of SCROLL depends on temperature and density, and the number of
A. Bar-Shalom, M. Busquet, M. Klapisch
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High Energy Density Physics, 2007 Abstract Models of average-atom- and superconfigurations-in-plasmas with full quantum description of all electrons are important in opacity and EOS calculations, especially in case of high density plasmas in which pressure ionization phenomena can occur.
Thomas Blenski, B. Cichocki
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