Computation of resonant states using explicitly correlated coordinates in Be-like atomic systems

ABSTRACT: We present an efficient computational method to obtain accurate values for energy positions and widths of autoionizing states in Be-like atomic systems. The two-active (outer) electron wavefunction is expanded in terms of Hylleraas-type correlated configurations. The interaction with the 1s2 frozen core is represented through a model potential and the unphysical 1sn` series of virtual core states are removed by using a Phillips-Kleinman pseudopotential projector. A novel feature is that all matrix elements can be written in closed form. We illustrate the performance of our approach in computing doubly-excited states in Be and Ne6+ by using the stabilization method.

• Autores: Cardona Gómez, Juan Carlos; Sanz Vicario, José Luis
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2009
• Institución: Universidad de Antioquia
• Repositorio: Repositorio UdeA
• Idioma: eng
• OAI Identifier: oai:bibliotecadigital.udea.edu.co:10495/8381
• Acceso en línea: http://hdl.handle.net/10495/8381
• Palabra clave: Onda electromagnética; Electromagnetic waves; Electrones; Electrons; Sistemas atómicos; Pseudopotencial; Estados resonantes; http://vocabularies.unesco.org/thesaurus/concept9533
• Rights: openAccess
• License: https://creativecommons.org/licenses/by-nc-nd/4.0/