Journal of Physics B Atomic Molecular and Optical Physics
On the quantum stationary state method in line broadening theory
Henri Van Regemorter
Abstract
The quantum stationary state method in the distorted wave Born approximation, applied to a two-body collision system in the presence of a radiation field, gives explicit expressions of the one-perturber profile and of the corresponding correlation function. The independent perturber approximation, when the two-body dynamic is separated from the statistical problem, is revisited without having recourse to a time-dependent formalism. Emphasis is given to broadening by electrons for which inelastic processes are important.