Sturmian approach to single photoionization of many electron atoms and molecules

International Conference on Many Particle Spectroscopy of Atoms, Molecules, Clusters and Surfaces 2014

Granados-Castro, C.M.^1,2 ; Ancarani, L.U.^1 ; Gasaneo, G.^2,4 ; Mitnik, D.M.^3,4

Equipe TMS, SRSMC, Université de Lorraine, Metz

57078, France^1

Departamento de Física, Universidad Nacional Del sur, Bahía Blanca, Buenos Aires

8000, Argentina^2

Instituto de Astronomía y Física Del Espacio (IAFE), Universidad de Buenos Aires, Buenos Aires, Argentina^3

Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina^4

关键词: Double ionization;    Expansion coefficients;    Many-electron atoms;    Molecular systems;    Photoionization transitions;    Scattering functions;    Single photo ionization;    Sturmian functions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/601/1/012009/pdf
DOI  :  10.1088/1742-6596/601/1/012009

来源: IOP

【 摘 要 】

The application of generalized Sturmian functions to the study of single photoionization of different atomic and molecular systems is illustrated using model potentials. Sturmian functions have been used successfully to study single and double ionization by electron impact on He, while their implementation to molecular systems is still under development. The radial part of the scattering function is expanded in a generalized Sturmian basis. The solution of the resulting matrix problem provides the expansion coefficients. The latter yield directly the photoionization transition amplitude and thus the cross sections. Here we show our preliminary results for He and Ne atoms on one hand, and for CH4 and H2O molecules on the other.