PLASMA-SCREENING EFFECTS ON BREMSSTRAHLUNG IN ELECTRON-ION COULOMB SCATTERINGS IN STRONGLY COUPLED PLASMAS

Plasma-screening effects are investigated for-the bremsstrahlung in el ectron-ion Coulomb scatterings in strongly coupled plasmas using the c lassical trajectory method. In strongly coupled plasmas, the electron- ion interaction potential is obtained by the ion-sphere model potentia l. The classical straight-line trajectory approximation is applied to the motion of the projectile-electron in order to investigate the vari ation of the differential bremsstrahlung radiation cross section as a function of the impact parameter and ion-sphere radius. The results sh ow that the plasma-screening effects for the differential bremsstrahlu ng radiation cross section are increased with increasing the ion-spher e radius. The differential bremsstrahlung radiation cross sections are decreasing as the, radiation energy increases. However, for a small i on-sphere radius the radiation cross sections are almost unchanged wit h increasing or decreasing the radiation energy. (C) 1996 American Ins titute of Physics.