Rates of Radiative Transitions and Atomic Spectra
The strongest radiative transitions due to dipole interaction are considered. Selection rules are analyzed for atoms. As an example, radiative transitions are represented with participation of lowest excited states of inert gas atoms. Broadening of spectral lines may be resulted from various mechanisms including Doppler broadening, Lorenz broadening, and also quasistatic shift and broadening of spectral lines. Parameters of atom radiation and absorption are defined and analyzed.