Collision strengths and effective collision strengths for Ne-like Ge

We have carried out a calculation of 241 levels for Ne-like Ge (Z = 36) to calculate electron impact collision strengths and effective collision strengths belonging to 1[s.sup.2]2[s.sup.2]2[p.sup.5]nl, 1[s.sup.2]2[s.sup.1]2[p.sup.6]nl (n = 3,4, 5, 6; l = s, p, d, f, g, and h) configurations, which have been calculated by the fully relativistic flexible atomic code (FAC). Our calculations, based on the distorted-wave method with large configuration interactions, are included. Collision strengths have been generated over an electron energy range of (10-20 000 eV) and they have been listed at seven representative energies of 65.33, 1714.98, 2944.1, 4868.3, 7564.6, 11040, and 15 221 eV in this work, and effective collision strengths data have been calculated from these at electron plasma temperatures 650, 850, 1050, 1250, 1450, 1650, and 1850 eV. Our results are compared with those available in the literature. It is found that the resonance effects are important in calculating the effective collision strengths. Key words: effective collision strength, laser, atomic, collision strengths, Ne -like Ge. Nous utilisons le Flexible Atomic Code completement relativiste pour calculer les 241 niveaux de Ge de type Ne (Z = 36), de facon a evaluer les forces de collision sous impact electronique et les forces de collision effectives qui appartiennent aux configurations 1[s.sup.2]2[s.sup.2]2[p.sup.5]nl, 1[s.sup.2]2[s.sup.1]2[p.sup.6]nl (n = 3, 4, 5, 6 ; l = s, p, d, g, h). Nos calculs sont bases sur une methode d'onde distordue, incluant des interactions de configurations etendues. Nous avons calcule les forces de collisions sur un large domaine d'energie electronique (10-20 000 eV) et nous les presentons ici a sept energies representatives de 65.33, 1714.98, 2944.1, 7564.6, 11 040 et 15 221 eV et les forces de collision effectives obtenues de ces resultats a des temperatures electroniques dans le plasma de 650, 850, 1050, 1250, 1450, 1650 et 1850 eV. Nous comparons nos resultats avec des resultats dans la litterature. Nous trouvons que les effets de resonance sont importants dans le calcul des forces de collision effectives. [Traduit par la Redaction] Mots-cles: forces de collision effectives, laser, atomique, forces de collision, Ge de type Cl.
1. Introduction Electron impact collision strengths and effective collision strengths are of fundamental importance in analyzing the physical state and chemical composition of gaseous nebulae and laboratory plasmas. At present [...]