Measured Stark width and shift of the Pα He II spectral line.

Astronomy and Astrophysics – Astronomy

Scientific paper

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Stark Effect: Helium Lines, Stark Effect: Plasma

Scientific paper

Stark width and shift of the Pα He II (468.59 nm) spectral line have been measured in helium plasma. A linear low-pressure arc is used as a plasma source. Measurements have been done at electron density in the range from 0.4 to 3.3×1022m-3 and at an electron temperature of 40000K. Measured Stark width and shift are compared to some theoretical estimations combining electron-impact and ion quadrupole effects.

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