On the behavior of the n1(K,T)An2 series of doubly excited states in He-like atoms immersed in weakly coupled plasmas

28th International Conference on Photonic, Electronic and Atomic Collisions

Ordóñez, A.F.^1 ; Cardona, J.C.^2 ; Sanz-Vicario, J.L.^1

Grupo de Física Atómica y Molecular, Institute de Física, Universidad de Antioquia, Medellín, Colombia^1

GEOEL, Universidad Del Atlántico, Barranquilla, Colombia^2

关键词: Complex scaling;    Doubly excited state;    Feshbach resonances;    Plasma environments;    Resonance parameters;    Resonant state;    Shape resonance;    Weakly coupled plasmas;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/6/062010/pdf
DOI  :  10.1088/1742-6596/488/6/062010

来源: IOP

【 摘 要 】

The stability of resonant states in Helium-like atoms while under the influence of a plasma environment is studied. We analyze the variation of resonance parameters (energies and lifetimes) against the strength of the screening parameter within the Debye-Hückel model. We use a Feshbach-like projection formalism with explicitly correlated CI-wave functions to uncover the evolution of resonance parameters until they cross the upper Aq+(N=2) threshold, and a complex scaling method to analyze the survival of these Feshbach resonances across the threshold, which eventually makes them behave as shape resonances.