Extensions to the spectrum of singly ionized barium (Ba ii)

This is the authors' abstract. We don't add key points for this paper.

The spectrum of singly ionized barium has been studied in absorption by flash pyrolysis. Corrected wavelengths and energy levels have been obtained. Fifteen new levels have been established and 24 new lines have been observed. Photoionization is shown to be the dominant ionization mechanism in this technique.