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Radiative opacity of low-Z plasma using screened hydrogenic model including l-splitting

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Title Radiative opacity of low-Z plasma using screened hydrogenic model including l-splitting
 
Creator DAS, M
SRIVASTAVA, MK
MENON, SVG
 
Subject Rosseland and planck opacity
Average atom model
Screened hydrogenic model
LASER-PRODUCED PLASMAS
DENSE-PLASMAS
ION MODEL
ATOMIC-STRUCTURE
Z-ELEMENTS
IONIZATION
HOT
COEFFICIENTS
STATE
 
Description Radiative opacities of low-Z plasma are computed using average atom model. Screened Hydrogenic Model including l-splitting (SHML) is used as the atomic model to obtain the internal structure of ions embedded in plasma. The phenomenon of pressure ionization of levels is described by a Gaussian density dependent degeneracy function. Use of the most recent compilation of the screening constants makes it possible to include l-splitting in a direct manner. The average ionization in the plasma is obtained by self-consistently solving the non-linear set of coupled SHML equations along with the charge neutrality condition of Wigner-Seitz cell. The frequency dependent opacity of Aluminum plasma is compared with the data obtained from Los Alamos (LANL) opacity library and a reasonable agreement is seen. The computed values of Rosseland and Planck opacity of C, Al and Fe plasma are also in good agreement with the LANL opacity database value for different plasma density and temperature. (C) 2011 Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2014-10-16T14:59:58Z
2014-10-16T14:59:58Z
2012
 
Type Article
 
Identifier JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER, 113(4)286-293
http://dx.doi.org/10.1016/j.jqsrt.2011.11.011
http://dspace.library.iitb.ac.in/jspui/handle/100/15847
 
Language en