Experimental Stark-broadening studies of the NI multiplet (1D)3s2D − (1D)3p2Po at 7904.5 Å
Institute of Physics, Opole University, ul. Oleska 48, 45-052 Opole, Poland
Corresponding author: a email@example.com
Revised: 23 December 2003
Published online: 9 March 2004
Experimental Stark-broadening studies of the NI multiplet (1D)3s2D − (1D)3p2Po are reported. Line shape measurements were performed using a wall-stabilized arc operated at atmospheric pressure in helium with small amounts of nitrogen and hydrogen. The radiation of the plasma emitted from nearly homogeneous plasma layers in end-on direction was measured using a grating spectrometer equipped with a charge-coupled device (CCD) detector. The arc current was varied from 35 to 50 A in order to obtain different plasma conditions (electron densities and temperatures). The so-called j(x) profiles of Griem, convoluted with the corresponding Doppler and apparatus profiles were fitted to the experimental data sets. In this way the Stark broadening parameters: the electron impact shifts and widths as well as ion-broadening asymmetry (A) for the investigated NI multiplet have been determined.
PACS: 32.70.Jz – Line shapes, widths, and shifts / 52.70.Kz – Optical (ultraviolet, visible, infrared) measurements
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004