Experimentelle Untersuchungen zur Stark-Verbreiterung der Balmer-Linien Hα und Hβ / Experimental Investigation of the Stark Broadening of the Balmer Lines Hα and Hβ

Abstract

The profiles of the Stark broadened Balmer lines H_α and H_β have been measured in a wide range of temperature and electron density. By the use of different light sources (3 wallstabilized arcs of different design, a pulsed discharge tube and a plexiglass-capillary discharge) the range was ex- tended to 1.0·10⁴≦T≦3.2·10^{4 °}K for the plasma temperature and to 1·10¹⁶≦n_e≦55·10¹⁶ cm⁻³ for the electron density in the H_β-scale. The experimental profiles of the H_α-line agree with generalized impact approximations if the condition: n_e ^2/3/T>2·10⁷ cm⁻² grad⁻¹ is fulfilled. Disagreements between the H_α and H_β electron density scale can be removed applying an empirical correction-factor to the electron density obtained from the half-width of H_α.