Abstract
We report discrepancies between the published theoretical calculations of the line profiles for allowed-forbidden transition pairs in neutral helium and observations of the He(I) line near 4471 Å in a pulsed arc plasma ( nin e ∽ 10 16 cm -3). Our observations suggest that insufficient wavelength precision in the results reported previously by others has obscured the apparent fact that the peaks in the experimental profile do not follow the wavelength shifts predicted by theory.
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