Results 61 to 70 of about 152 (76)
Physics of Plasmas, 2005 The model of superconfiguration (SC) temperatures has been used extensively for computing the population dynamics of very large systems in hot dense plasmas. Plasmas of Ge, Xe, and Au have been studied for a wide range of values of Te and Ne. For plasmas containing a distribution of a dozen of ionization states, two systems of a few hundreds of linear ...
O. Peyrusse +2 more
openalex +2 more sources
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.
T. Błeński, B. Cichocki
openalex +3 more sources
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.
B. G. Wilson +2 more
openalex +3 more sources
Physical Review E, 1999 Statistical methods of describing and simulating complex ionized plasmas requires the development of reliable and computationally tractable models. In that spirit, we propose the screened-hydrogenic average atom, augmented with corrections resulting from fluctuations of the occupation probabilities around the mean-field equilibrium, as an approximation
G. Faussurier
openalex +3 more sources
Contributions to Plasma Physics, 2009 AbstractUsing the chemical‐picture representation of plasmas as a mixture of various ions and free electrons, a consistent description of thermodynamics of dense multicharged‐ion plasmas is being developed that involves the effects of Coulomb non‐ideality and degeneracy of plasma electrons; contribution of the excited ion states (on the base of the ...
P. A. Loboda +2 more
openalex +2 more sources
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
J. Bauche +6 more
openalex +2 more sources
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
openalex +2 more sources
Journal of Quantitative Spectroscopy and Radiative Transfer, 2005 We propose a thermodynamically consistent model involving detailed screened ions, described by superconfigurations, in plasmas. In the present work, the electrons, bound and free, are treated quantum-mechanically so that resonances are carefully taken into account in the self-consistent calculation of the electronic structure of each superconfiguration.
Jean‐Christophe Pain +2 more
openalex +2 more sources
Journal of Quantitative Spectroscopy and Radiative Transfer, 2003 Abstract We propose a new thermodynamic approach to ions in dense plasmas taking into account the screening by free electrons. The ions in fundamental and excited states are represented by a group of superconfigurations. Each superconfiguration containing an integer number of bound electrons is totally screened by free electrons in a Wigner–Seitz (WS)
Jean‐Christophe Pain, T. Błeński
openalex +2 more sources
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.
T. Błeński, B. Cichocki
openalex +2 more sources