The C i 247.8561 nm resonance line stark broadening parameters

Abstract

The Stark width (W) and shift (d) of the neutral carbon (C I) 247.8561 nm resonance spectral line in the 2p21S0 -2p3s 1Plo transition have been measured at 17,600 K electron temperature and 1.08 · 1023 m-3 electron density in an oxygen-carbon plasma created in an optically thin, linear, low-pressure, pulsed arc discharge. They represent the first experimental results obtained at an electron temperature higher than 14,000 K. We have found a symmetrical line profile, generated dominantly by electrons as perturbers. Our W and d values have been compared to the existing experimental and theoretical data. Good agreement was found between the results calculated by a semiclassical approximation and our data, particulary in the case of the Stark shift. © 2006 Verlag der Zeitschrift für Naturforschung.