Electron-impact excitation of W 44+ and W 45+

Plans to employ tungsten in the divertor region of the International Thermonuclear Experimental Reactor require radiative and collisional data for modelling x-ray emissions of highly ionized stages of tungsten. In an earlier paper, we reported on the results of fully relativistic R -matrix calculations for W 46+ that included the effects of radiation damping on the resonance contributions. In this paper, we present the results of similar fully relativistic, radiatively damped R -matrix calculations for W 44+ and W 45+ . Radiation damping is found to be small for W 45+ , but is appreciable for many of the excitations from the ground and metastable levels of W 44+ . Rates from the present calculations will be combined with those from the calculations for W 46+ and employed for collisional-radiative modelling for these ions.

Unesp Ciência, 2013, ano 4, número 44

Revista elaborada pela Assessoria de Comunicação e Imprensa da Reitoria da UNESP

Justinianus imperator, Institutiones (2-44). - Summa Codicis (44v-95).

Le ms. a appartenu à Antoine Loisel (signature "Ant. Loisel" au f. 2), avocat et grand-père de Claude Joly, chantre de Notre-Dame qui légua les mss. dont il avait hérité de son grand-père au chapitre de Notre-Dame de Paris en 1680. Sur le f. 1v figure l'ex-libris "A la bibliotheque de l'Eglise de Paris", suivi de la cote F11 (XVIIe s.). Notre-Dame.