The generalized oscillator strengths of hydrogenlike ions in Debye plasmas

Abstract

Plasma screening effects on the high-energy electron-impact excitation of hydrogenlike ions are investigated under the first Born approximation. The screening interactions are described by the Debye–Hückel model, and the wave functions are calculated numerically in a symplectic scheme. The generalized oscillator strengths (GOS) for transitions between the principal quantum number n⩽3 bound states are presented, and as an example, the scaled differential cross sections and total cross sections for 1s→2s and 2p and 2s→2p transitions are also given. It is found that the plasma screening interactions reduce the GOS for transitions between the states with different n and increase the GOS between the states with same n. The differential and total cross sections are decreased as the screening interactions increase.