Electron Collision Shift of the Lyman-A Line of Ionized Helium

Phys. Rev. A 41, 6928 (1990)https://ireap.umd.edu/10.1103/PhysRevA.41.69281990Journal ArticlePlasma, Accelerator, and Nuclear Physics

The electron collision shift of the He+ Lyman-α line emitted from a low-density plasma has been calculated in the distorted-wave approximation with the inclusion of second-order corrections to the diagonal elements of the scattering matrix. The effects of exchange, inelastic collisions, interference term, and second-order contributions to the line shift are compared. The present results are also compared with the semiclassical calculations, the Coulomb-Born approximation, the results based on the R-matrix method, and the line shifts derived from the electrostatic interaction of the radiator with the surrounding plasma.