Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/46062
Title: Calculation of the radiative opacity of laser-produced plasmas using a relativistic-screened hydrogenic model
Authors: Rubiano, JG 
Florido, R 
Rodriguez, R 
Gil, JM 
Martel, P. 
Mínguez, E.
UNESCO Clasification: 220410 Física de plasmas
220703 Física atómica
Keywords: Atomic models
Ionization state
Physics of dense plasmas
Screened hydrogenic model
Radiative opacity
Issue Date: 2003
Publisher: 0022-4073
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer 
Abstract: n this work, we use a relativistic-screened hydrogenic model to compute the radiative opacity of laser-produced plasmas. The model is based on a set of screening charges which allow one to easily calculate atomic properties of isolated ions. These screened charges have been fitted to a fourth-order polynomial depending on the nuclear charge Z for ground and single excited states of ions belonging to the isoelectronic sequences comprised between He-like to U-like. In the opacity model used, ionic populations are obtained by solving the Saha equation including degeneracy corrections. Bound–bound transitions are determined using a Voigt profile for line shape, which includes natural, collisional, Doppler and UTA widths. Bound–free and free–free opacities are evaluated using the Kramer cross-sections with appropriate corrections. Scattering processes are computed through the use of the Thomson formula with corrections. The results are compared with other screened hydrogenic models and more sophisticated self-consistent codes.
URI: http://hdl.handle.net/10553/46062
ISSN: 0022-4073
DOI: 10.1016/S0022-4073(02)00298-4
Source: Journal Of Quantitative Spectroscopy & Radiative Transfer [ISSN 0022-4073], v. 83 (2), p. 159-182
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