Stark width regularities within spectral series of neutral alkaline and alkaline earth metals

Abstract

Stark width regularities within spectral series originating from neutral atoms of alkaline and alkaline earth metals homologous group were found and discussed. The emphasis is on: (i) the Stark width (w) simultaneous dependence on the upper level ionization potential ( χ ); and (ii) term structure influence on the found Stark parameter dependences. Stark widths published data are used to demonstrate the existence of these kinds of regularities for the electron impact contributions to the Stark widths within these homologous spectral series. The found relations for particular electron temperature and density were of the form w=A χ -B where A, B are constants, for particular homologous spectral series. These functional dependences are different for singlet and triplet series. The obtained functions were used to predict Stark widths data for lines not calculated or measured so far within this group of elements. These data were compared with already published data.