Magdalena Christova

Stark broadening of B iv spectral lines

Stark broadening parameters for 157 multiplets of helium like boron (B IV) have been calculated using the impact semiclassical perturbation formalism. Obtained results have been used to investigate the regularities within spectral series. An example of the influence of Stark broadening on B IV lines in DO white dwarfs is given.

Stark broadening of B IV lines for astrophysical and laboratory plasma research

Abstract Stark broadening parameters for 36 multiplets of B IV have been calculated using the semi-classical perturbation formalism. Obtained results have been used to investigate the regularities within spectral series and temperature dependence.

Similarities in calculated stark broadening parameters of argon spectral lines

The similarities of the calculated Stark broadening parameters of four argon spectral lines within a spectral series 3p5→3p54p have been analyzed. The Stark broadening parameters have been calculated using Sahal-Brechot theory within the semi-classical perturbation formalism. The dependeces of the Stark width and shift versus the effective quantum number have been presented.

Stark Broadening Parameters of Ne I 837.8 nm Spectral Line

The Stark broadening parameters of Ne I 837.8 nm spectral line corresponding to the transition 2p53d 2[7/2]°4 − 2p53p 2[5/2]3 have been calculated using Sahal-Brechot theory. The temperature dependence of the width and shift has been obtained.

Calculation of the shifts of argon spectral lines

Shifts due to collisions with charged particles (Stark broadening ) and neutral atoms, were determined for nine argon spectral lines corresponding to the transitions 3p5nd‐3p54p for n = 4‐7, 3p56s‐3p54d and 3p54p’ ‐3p54s in order to estimate their usability for the research and diagnostics of a plasma in a surface‐wave discharge at atmospheric pressure.

Using line broadening to determine the electron density in an argon surface‐wave discharge at atmospheric pressure

Broadening due to collisions with charged particles (Stark broadening ) and neutral atoms, was determined for Ar I 522.1, 549.6 and 603.2 nm spectral lines from the spectral series 3p5nd‐3p54p, in order to evaluate the electron density in a surface‐wave discharge at atmospheric pressure.

Electron‐impact broadening of Ar I 737.212 nm spectral line for stellar atmospheres research

Stark broadening parameters (width and shift) for Ar I 737.212 nm spectral line have been determined within the semiclassical perturbation theory for the stellar plasma conditions.

Calculation of Shift of Argon Lines by Elastic Collisions Emitter—Neutral Atoms

The shift of three argon spectral lines due to the interactions between the excited atoms and atoms in a ground state has been calculated. These lines belong to one spectral series 3p5nd 2[7/2]4−3p54p 2[5/2]3 for n = 5–7. The dependence of the shift coefficient on gas temperature under atmospheric pressure has been obtained. The semi‐classical impact theory has been applied and Kaulakys potential has been used.

On the Broadening of Spectral Lines in Surface Wave Discharges

The broadening of argon spectral lines emitted in surface wave discharges has been examined under pressure range 1 Torr–1 atm. The different mechanisms of broadening have been studied. Interpretation of the experimental results is discussed. The study is of interest for plasma diagnostics.

Calculation of broadening of several Ar I spectral lines by neutral atoms

Calculations of broadening of nine Ar I spectral lines due to collisions with neutral argon atoms are presented. The semi-classical impact broadening theory has been used. The interaction of an excited Ar atom with Ar atom in the ground state has been treated using the Kaulakys potential and a comparison with other potentials has been performed. The influence of the Maxwellian averaging and the scattering length on the broadening cross section has been studied.