Model function for measuring neon line Stark shift

Abstract

The analysis of DC Stark shift for NeI 511.367 nm line was previously reported by Jäger and Windholz [1] who found that the line splits into three Stark components, shifted towards larger wavelengths (i.e. smaller wave numbers). In a wide range of electric field (>50 kV/cm), they successfully fitted measured Stark shifts with eq. 2, using the Stark coefficients listed in table 2, see [1]. Unfortunately, this neon line exhibits small Stark shifts, which require high spectral resolution for reliable electric field strength measurement in the cathode sheath (CS) region of neon glow discharge (GD). Fortunately, there are another neutral neon lines, such as NeI 503.134 nm, which have much larger Stark shifts, but there are no experimental data for determination of algebraic coefficients for electric field strength evaluation. To measure the Stark shifts of the NeI 511.367 nm line, we have fitted its experimental profiles with the model function developed for this purpose. The aim of this work are measurements Stark shift of NeI 511.367 nm and comparison with results obtained in [1].