Stark broadening parameters calculation of the allowed 4471 Å line and forbidden 4470 Å component of neutral helium with different electric microfield distribution functions

Abstract

The influence of an electric microfield distribution function (EMDF) on line shapes and on Stark broadening parameters is studied. For this purpose, we use different EMDFs obtained by theoretical calculations and computer simulation methods to calculate the allowed 4471 Å neutral helium line and its forbidden 4470 Å component. Correlation effects are shown by considering different categories of plasmas, weakly coupled plasmas and strongly coupled plasmas, with large gaps of temperature and density.

Division B Commission 14 Working Group: Collision Processes

“…Also broadening of He I 492.2 nm line has been investigated theoretically by computer simulation (Lara et al 2012), and with its forbidden components experimentally (Ivković et al 2013). New Stark broadening parameters have been calculated for the allowed 447.1 nm line and its forbidden component at 447.0 nm (Faye et al 2011), as well as for the 388.9 nm line (Omar et al 2014).…”