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 |
Appears in Collections: | Artículos |
Items in accedaCRIS are protected by copyright, with all rights reserved, unless otherwise indicated.