N III and N IV line emission following K-shell photoionization
D. Petriniand F.X. de Araújo 1, 2
Received 21 March 1997 / Accepted 12 May 1997
Soft X-ray irradiation of low density cold matter K-ionizes neutral nitrogen. The full ionization process followed by Auger decay populates the excited states of N III and N IV ions. N III and N IV uv lines are therefore produced directly with comparable intensities. Some observable intensity ratios are evaluated.
Key words: atomic processesatomic dataUV: generalX-rays: general
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© European Southern Observatory (ESO) 1997
Online publication: October 15, 1997