https://doi.org/10.1140/epjd/e2004-00026-2
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 bartecka@uni.opole.pl
Received:
6
October
2003
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