معامل التصادم الأيوني في البلازما النسبية

Résumé: The spectrum of the lines responds by width or displacement to the different interactions between the emitter and the disturbers which precede or accompany the radiation. In this thesis, we calculate this parameter for isolated lines without the fine structure, where we take the path of the perturbed ion in the form of a hyperbola and the center of the diffusion is the emitting ion. Then we calculated the average value of the collisions according to the impact parameter and the initial velocities and according to the Maxwell-Juttner distribution in the relativistic case. It is considered that the ions at high temperature are considered fast and are studied in the impact approximation, and that their movement around the emitter ion is done according to a relativistic trajectory. We found for the first time the broadening of the relativistic ion collision operator and thus calculated the contribution of the relativistic effect compared to the non-relativistic case. We also presented a set of comparisons for the different values of ion density, atomic number, and ion temperature that have the greatest effect at high temperature. We also studied the relativistic effect on the line spectrum.

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