Bremsstrahlung radiation from electron–ion polarization scatterings in strongly coupled plasmas

Abstract

Low energy bremsstrahlung processes in electron–ion polarization scatterings in strongly coupled plasmas described by the ion-sphere model are investigated using the classical trajectory method. The interaction between the projectile electron and the screened target ion is given by the attractive polarization interaction between the projectile electron and the induced dipole. The classical straight-line trajectory method is applied to represent the differential bremsstrahlung radiation cross section as a function of the impact parameter and ion-sphere radius. The results show that the bremsstrahlung radiation due to the component of the acceleration perpendicular to the projectile velocity is dominant for small impact parameters, especially, for soft photon radiation. However, for large impact parameters, the contribution from the component of the acceleration parallel to the velocity is almost comparable to that from the component of the acceleration perpendicular to the velocity.