FIZIKA A 14 (2005)  2, 135 - 152

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SHIFT AND BROADENING OF SODIUM nS-3P AND mD-3P TRANSITIONS IN HIGH PRESSURE NaCd AND NaHg DISCHARGES

ŽELJKA MIOKOVIĆ a,b, DARKO BALKOVIĆ a and DAMIR VEŽAa,1

aPhysics Department, Faculty of Science, University of Zagreb, Bijenička 32
HR-10 002 Zagreb, Croatia
bFaculty of Electrical Engineering, University of Osijek, K. Trpimira 2B
31 000 Osijek, Croatia
1E-mail address: veza@phy.hr

Dedicated to the memory of Professor Vladimir Šips

Received 1 February 2005;  revised manuscript received 3 June 2005
Accepted 13 June 2005     Online 4 December 2005

We report measurements of the Stark shift and Stark width of sodium spectral lines corresponding to n2S1/2-32P3/2,1/2 (n=5,6,7) and m2D5/2,3/2-32P3/2,1/2 (m=5,6) transitions. Measurements have been made on AC-driven high-pressure Na-Hg-Xe and Na-Cd-Xe discharges. Electron density has been determined from the measurements of the Stark shift of sodium 72S1/2-32P1/2,3/2 spectral line. The electron temperature and the density of neutral particles have been determined analyzing the shape of the measured sodium atomic lines, by comparison of the calculated and the observed line profiles. Electron density and temperature range from 6 ×1021 to 1 ×1022 m-3 and from 3800 to 4100 K, respectively. Dependence of measured Stark shifts and Stark widths on electron density and temperature have been investigated. The final results have been compared with available theoretical and experimental data.

PACS numbers: 52.70.Kz, 52.80.Mg, 52.25.Os
UDC 537.228.5

Keywords: Stark shift and width, Na spectral lines, Na-Hg-Xe and Na-Cd-Xe discharges

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