Laser-assisted singly and doubly ionizing electron-helium collisions at high impact energy and large momentum transfer

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

Bulychev, Andrew A.^1 ; Kouzakov, Konstantin A.^2

Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Moscow Region, Dubna

141980, Russia^1

Department of Nuclear Physics and Quantum Theory of Collisions, Faculty of Physics, Lomonosov Moscow State University, Moscow

119991, Russia^2

关键词: Double ionization;    Electron impact;    Electron-electron correlation;    Fast electrons;    Fully differential cross sections;    High impact energy;    Large momentum transfers;    Laser-assisted;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/5/052057/pdf
DOI  :  10.1088/1742-6596/635/5/052057

来源: IOP

【 摘 要 】

Electron-impact single and double ionization of a helium atom in the presence of laser radiation with low frequency and intensity is studied theoretically. The kinematical regime of high impact energy and large momentum transfer, with two fast electrons in the final channel, is considered. Fully differential cross sections corresponding to the laser-assisted (e, 2e) and (e, 3e) processes are calculated for different models of the target state. The laser-assisted cross sections are found to be more sensitive to the electron-electron correlations in helium than the field-free ones.