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Title: Collisional radiative average atom code based on a relativistic Screened Hydrogenic Model
Authors: Benita, A. J.
Mínguez, Emilio
Mendoza, M.A. 
Rubiano, Jesus G. 
Florido, Ricardo 
Gil, J. M. 
Rodríguez, R. 
Martel, Pablo 
UNESCO Clasification: 2207 Física atómica y nuclear
Keywords: Screened Hydrogenic Model
Average atom model
Collisional radiative code
Rosseland and Planck mean opacities, et al
Issue Date: 2015
Project: Determinación de Propiedades Radiativas, Termodinamicas y Diagnosis Espectroscopica de Plasmas de Interés Científico-Tecnológico 
SOLSUBC2008000057 (Agencia Canaria de Investigación, Innovación y Sociedad de la Información, Gobierno de Canarias)
Journal: High Energy Density Physics 
Abstract: A steady-state and time-dependent collisional-radiative ‘‘average-atom’’ (AA) model (ATMED CR) is presented for the calculation of atomic and radiative properties of plasmas for a wide range of laboratory and theoretical conditions: coronal, local thermodynamic equilibrium or nonlocal thermodynamic equilibrium, optically thin or thick plasmas and photoionized plasmas. The radiative and collisional rates are a set of analytical approximations that compare well with more sophisticated quantum treatment of atomic rates that yield fast calculations. The atomic model is based on a new Relativistic Screened Hydrogenic Model (NRSHM) with a set of universal screening constants including nlj-splitting that has been obtained by fitting to a large database of ionization potentials and excitation energies compiled from the National Institute of Standards and Technology (NIST) database and the Flexible Atomic Code (FAC). The model NRSHM has been validated by comparing the results with ionization energies, transition energies and wave functions computed using sophisticated self-consistent codes and experimental data. All the calculations presented in this work were performed using ATMED CR code.
ISSN: 1574-1818
DOI: 10.1016/j.hedp.2015.02.004
Source: High Energy Density Physics [ISSN 1574-1818], v. 14, p. 18-29
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