STARK-PROFILE CALCULATIONS FOR RESONANCE LINES OF HELIUMLIKE ARGON IN DENSE-PLASMAS

The photon energy distributions of the first three resonance lines of heliumlike argon broadened by the local fields of both ions and electrons are calculated for dense H, D, or T plasmas containing small amounts of argon. The electron collisions are treated by an impact theory allowing for both widths and shifts in the distorted-wave approximation to all significant orders of the multipole expansion for the electron-radiator interaction. Ion effects are treated in the quasistatic approximation for dipole interactions between ions and radiators. These interactions between states of a given principal quantum number are calculated in the intermediate-coupling representation, using ion-field-strength distribution functions calculated by Boercker with the method of Iglesias et al [Phys. Rev. A 28, 1667 (1983)]. The profiles obtained were corrected for thermal Doppler broadening and also for ion-dynamical effects according to Stamm et al. [Phys. Rev. A 34, 4144 (1986)]. © 1990 The American Physical Society.