Variational study of atomic hydrogen ionization by electrons impact

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

Benmansour, N E Houda^3 ; Sahlaoui, Mohammed^2 ; Bouamoud, Mammar^1

University Center of Naama, Naama

45000, Algeria^1

Ecole Préparatoire en Sciences et Techniques, Tlemcen

13000, Algeria^2

Theoretical Physics Laboratory, University AbouBekr Belkaid of Tlemcen, BP 119, Tlemcen

1300, Algeria^3

关键词: Atomic hydrogen;    Closure approximation;    Ejected electrons;    Electron impact-ionization;    Incident electrons;    Theoretical calculations;    Triple differential cross sections;    Variational principles;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/5/052052/pdf
DOI  :  10.1088/1742-6596/635/5/052052

来源: IOP

【 摘 要 】

Triple differential cross section results of the electron impact ionization of hydrogen atom are performed in the so-called Schwinger-Born approximation of variational principle of Schwinger. In the theoretical calculations the first Born term was calculated analytically, and the second Born term was determined in the closure approximation using semi-analytical calculations. The theoretical results were corrected by the so-called Gamow factor in order to include post-collision effects, then compared with experiments performed with an incident electron energy of Ei= 250 eV and with those of other models. Better agreement was found between our results and experimental data even for high values of the ejected electrons energy (50 eV).