TY - JOUR

T1 - Atomic process modeling in dense hydrogenic plasmas by nearest neighbor approximation

AU - Nishikawa, T.

N1 - Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.

PY - 2016/4/1

Y1 - 2016/4/1

N2 - Atomic process modelling for obtaining the electronic state densities of the bound and free electrons and calculating the resulting average ionization degrees of dense hydrogenic plasmas is studied. In the analysis of atomic processes in plasmas, the Saha equation is usually solved to obtain population of each ionic species of various electronic configurations and resulting average ionization degrees as a function of electron temperature and plasma density under the assumption that the plasmas are in a certain equilibrium, for example, the thermodynamic equilibrium. I had proposed an atomic model based on the nearest neighbor approximation to determine a finite state density of the bound state and a state density of the free electron in hydrogenic plasmas. Using the models, we had been able to calculate the population for ions of various electronic configurations in hydrogenic plasmas without any ad hoc parameters to determine the electronic state densities. Unfortunately, the models had not been able to apply for dense plasmas near solid density. In this paper, examining the effect of the Coulomb interaction between the two ions and the Saha equation, we discuss the applicability of the models for dense hydrogenic plasmas.

AB - Atomic process modelling for obtaining the electronic state densities of the bound and free electrons and calculating the resulting average ionization degrees of dense hydrogenic plasmas is studied. In the analysis of atomic processes in plasmas, the Saha equation is usually solved to obtain population of each ionic species of various electronic configurations and resulting average ionization degrees as a function of electron temperature and plasma density under the assumption that the plasmas are in a certain equilibrium, for example, the thermodynamic equilibrium. I had proposed an atomic model based on the nearest neighbor approximation to determine a finite state density of the bound state and a state density of the free electron in hydrogenic plasmas. Using the models, we had been able to calculate the population for ions of various electronic configurations in hydrogenic plasmas without any ad hoc parameters to determine the electronic state densities. Unfortunately, the models had not been able to apply for dense plasmas near solid density. In this paper, examining the effect of the Coulomb interaction between the two ions and the Saha equation, we discuss the applicability of the models for dense hydrogenic plasmas.

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U2 - 10.1088/1742-6596/688/1/012077

DO - 10.1088/1742-6596/688/1/012077

M3 - Conference article

AN - SCOPUS:84964878023

VL - 688

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 1

M1 - 012077

T2 - 8th International Conference on Inertial Fusion Sciences and Applications, IFSA 2013

Y2 - 8 September 2013 through 13 September 2013

ER -