Laser-Assisted He-atom Scattering in Mixed Circular Polarized Field
DOI:
https://doi.org/10.5433/1679-0375.2026.v47.52838Keywords:
scattering dynamics, screening, Volkov wave, non-screening potentials, photonAbstract
The aim of this work is to study the scattering dynamics of electrons by helium screening and non-screening potentials in a mixed circular polarized laser field. For this, we developed a theoretical model using Volkov wave function of a mixed laser field, S-matrix, Bessel functions and Kroll and Watson approximation of the differential cross section (DCS). The developed model was numerically simulated using MATLAB programming language. The results show that DCS generally increases with separation distance and momentum transfer. For the case N=M=0, DCS exhibits a sinusoidal variation with scattering angle. For N=M=1, DCS increases with distance and momentum transfer, but decreases with scattering angle due to damping; interference peaks occur at specific phases for small angles, while at larger angles DCS shows interference behavior with phase-related decrease. For N=M=2 and N=M=3, DCS similarly increases with distance and momentum transfer, with scattering angle showing damping followed by interference beyond certain angles. Higher photon exchanges further lower DCS amplitude and enhance phase sensitivity. The findings highlight the significant role of laser phase and photon exchange in controlling electron-helium scattering dynamics.
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Copyright (c) 2026 Basanta Ghimire, Kishori Yadav, Suresh Prasad Gupta, Manish Pokhrel, Sharad Kumar Oli, Saddam Husain Dhobi
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