Issue
J. Phys. Colloques
Volume 50, Number C1, Janvier 1989
International Conference on the Physics of Multiply Charged Ions and International Workshop on E.C.R. Ion Sources
Page(s) C1-99 - C1-103
DOI https://doi.org/10.1051/jphyscol:1989110
International Conference on the Physics of Multiply Charged Ions and International Workshop on E.C.R. Ion Sources

J. Phys. Colloques 50 (1989) C1-99-C1-103

DOI: 10.1051/jphyscol:1989110

EXTENSION OF THE CONVENTIONAL AND PSEUDOPOTENTIAL FESHBACH METHODS TO THE STUDY OF "TWO ACTIVE ELECTRONS + CORE" RESONANCE STATES. APPLICATION TO C2+ (1s23l3l' ) and Ne6+ (1s23l3l') SYSTEMS

A. MACIAS1, O. MO1, A. RIERA1, M. YAÑEZ1, H. BACHAU2, P. GALAN2 and F. MARTIN2, 3

1  Departamento de Quimica, Facultad de Ciencias C-XIV, Universidad Autonoma de Madrid, SP-28049 Madrid, Spain
2  Laboratoire des Collisions Atomiques, CNRS ER-260, Université de Bordeaux I, F-33405 Talence, France
3  Departamento de Quimica. Facultad de Ciencias C-XIV, Universidad Autonoma de Madrid, SP-28049 Madrid, Spain


Résumé
Nous étudions l'extension des méthodes "conventional-Feshbach" et "pseudopotential-Feshbach" au calcul des paramètres des résonances de systèmes à un coeur 1s2 et deux électrons actifs, le coeur étant décrit par un potentiel modèle. Comme application nous calculons les énergies et largeurs des résonances 1Se, 1,3 p0 (1s23l3l) de C2+ et Ne6+. L'accord entre les deux méthodes est très encourangeant du point de vue de la souplesse et de la rapidité de calcul de la méthode "pseudopotential-Feshbach"


Abstract
We report an extension of the conventional and pseudopotential Feshbach methods to the calculation of resonance parameters in atomic systems with two active electrons in the presence of a closed core which is described by a model potential. As illustration, energy positions, total and partial widths are calculated for the 1Se, 1,3P0 (1s2 3l3l') resonances of C2+ and Ne6+. Agreement between the two Feshbach procedures is very encouraging in view of the versatility and computational speed of the pseudopotential method.