Inelastic electron-ion scattering in a dense plasma

The Born approximation was used to investigate the influence of a dense plasma on the inelastic scattering of electrons by one-electron ions. Scaled collision strengths Z2Q for 1s → 2s, 1s → 2p and 2s → 2p transitions in an ion of arbitrary nuclear charge Z were computed for a Debye-Hueckel model of the screened Coulomb interaction. Over a wide range of screening lengths, the effect of the plasma environment is to appreciably reduce cross sections just above threshold