Photoionization of metastable state 1s2s 1S0 of helium

28th International Conference on Photonic, Electronic and Atomic Collisions

Wan, Jianjie^1

College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou, Gansu

730070, China^1

关键词: Configuration interactions;    Interference effects;    Meta-stable state;    Multiconfiguration Dirac-Fock;    Nonresonant;    Parameterization techniques;    Photoionization cross section;    Photoionization process;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/2/022005/pdf
DOI  :  10.1088/1742-6596/488/2/022005

来源: IOP

【 摘 要 】

The interference effects between the direct and indirect photoionization processes from the metastable state 1s2s1S0of helium are studied by employing the multi-configuration Dirac-Fock (MCDF) method combining with the Fano parameterization technique. Good agreement is found between the present calculations and the available experimental results. It is shown that the interference effects, which further modified the direct photoionization cross sections even far away from the resonances, play an important role in reproducing the resultant nonresonant background beside the configuration interaction in bound ionic states.