Abstract
Electron impact rovibrational excitation of the HF molecule (in the electronic ground state) is studied in the presence of an infra-red laser beam taken in the dipole approximation. The non-perturbative quasi-energy method is used to describe the laser-molecule interaction while the electron-molecule interaction is treated within the first Born approximation. The utility of our formalism is illustrated by computing the differential cross section (DCS) for vibration-rotation transitions in HF molecule due to joint collisions with electrons and photons. We also discuss the influence of various laser parameters (polarization, frequency and intensity) that strongly affect the dynamics of the collisions. It is found that laser fields can produce significant changes in the DCS.
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