Non-perturbative B-spline R-matrix with pseudo-states calculations for electron-impact excitation-ionization of helium to the n=3 states

29th International Conference on Photonic, Electronic, and Atomic Collisions

Zatsarinny, Oleg^1 ; Bartschat, Klaus^1

Department of Physics and Astronomy, Drake University, Des Moines

IA

50311, United States^1

关键词: 3 state;    B-spline R-matrix;    Close coupling;    Electron impact-ionization;    Electron-impact excitation;    Fully differential cross sections;    Ionization of heliums;    Pseudo state;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/9/092018/pdf
DOI  :  10.1088/1742-6596/635/9/092018

来源: IOP

【 摘 要 】

We present fully-differential cross sections for electron-impact ionization plus simultaneous excitation of helium obtained from a non-perturbative close-coupling formalism with our B-spline R-matrix approach. Using a large number of pseudo-states we obtain excellent agreement with directly measured cross-section ratios for ionization leaving the residual He+ion in either the 1 s ground state, the n = 2 (2s + 2p) excited states, or the n = 3 (3s + 3p + 3d) excited states.