Laser-assisted single and double ionization of helium by electron impact

Andrey A. Bulychev; Konstantin A. Kouzakov; Sergey I. Vinitsky

doi:10.1117/12.2179952

19 March 2015 Laser-assisted single and double ionization of helium by electron impact

Andrey A. Bulychev, Konstantin A. Kouzakov, Sergey I. Vinitsky

Proceedings Volume 9448, Saratov Fall Meeting 2014: Optical Technologies in Biophysics and Medicine XVI; Laser Physics and Photonics XVI; and Computational Biophysics; 944829 (2015) https://doi.org/10.1117/12.2179952
Event: Saratov Fall Meeting 2014, 2014, Saratov, Russian Federation

Abstract

We consider theoretically laser-assisted ionization of a helium atom by electron impact at large momentum transfer. Fully differential cross sections of these processes are studied as functions of the recoil-ion momentum for the cases when the residual He⁺ ion is left both in the bound (n = 1 and n = 2) and in the continuum states in the presence of a linearly-polarized laser field with frequency w = 1.55 eV and intensity I = 5×10¹¹W/cm². We inspect how the orientation of the polarization influences the laser-assisted momentum profiles using different models of the helium wave function. It is found that the Kroll-Watson sum rule is well applicable in the (e, 3 − 1e) case.

Citation Download Citation

Andrey A. Bulychev, Konstantin A. Kouzakov, and Sergey I. Vinitsky "Laser-assisted single and double ionization of helium by electron impact", Proc. SPIE 9448, Saratov Fall Meeting 2014: Optical Technologies in Biophysics and Medicine XVI; Laser Physics and Photonics XVI; and Computational Biophysics, 944829 (19 March 2015); https://doi.org/10.1117/12.2179952

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