Quantum state and screening effects on electron-hydrogen polarization bremsstrahlung in partially ionized plasmas

Abstract

The polarization bremsstrahlung radiation due to electron-neutral atom scatterings in partially ionized hydrogen plasmas is investigated. A screened polarization potential model is applied to describe the polarization interaction between the projectile electron and the neutral target atom. The classical trajectory analysis is applied to represent the polarization bremsstrahlung radiation cross section as a function of the impact parameter, Debye length, radiation photon energy, and collision energy. The results show that the plasma screening effects on the bremsstrahlung cross section are found to be more significant for the soft photon radiation. It is also found that the bremsstrahlung radiation cross section is significantly increased with the increasing quantum state.