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Article Dans Une Revue Journal of Quantitative Spectroscopy and Radiative Transfer Année : 2001

Observation of ion-ion correlation effects on emissivity and opacity of hot ultra-dense low Z plasmas

Résumé

The transmission function and the resulting emissivity and opacity of bound-bound transitions in hot ultra-dense, low Z (aluminum or fluorine) plasmas are investigated in this paper. It is shown that the treatment of both the area-normalized line profiles and the absorption oscillator strengths involved are crucial. Taking account, self-consistently, of all the interactions inside a radiating transient molecule, as proposed in the dicenter code IDEFIX, we computed the photo-excitation cross-sections, the emissivities, the opacities, and then compare the results with those from standard codes. We emphasize the strong dependence of the above quantities with the ionic correlations. A first experiment, devoted to measure opacities and emissivities of hot and ultra-dense aluminum plasmas, has been designed. The interpretation of the results shows the adaptability of the dicenter model for these extreme conditions. (C) 2001 Elsevier Science Ltd. All rights reserved.

Dates et versions

hal-01457153 , version 1 (06-02-2017)

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E Leboucher-Dalimier, P Sauvan, P Angelo, A Poquerusse, R Schott, et al.. Observation of ion-ion correlation effects on emissivity and opacity of hot ultra-dense low Z plasmas. Journal of Quantitative Spectroscopy and Radiative Transfer, 2001, 71 (2-6), pp.493-504. ⟨10.1016/S0022-4073(01)00092-9⟩. ⟨hal-01457153⟩
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