C III and C IV line emission following K-shell photoionization
D. Petrini 1 and
E.P. da Silva 2
Received 19 April 1996 / Accepted 22 May 1996
Soft X-ray irradiation on low density cold matter K-ionizes neutral carbon. The complete ionization process, single ionization and shake-off processes, followed by Auger decay produces excited states of C III and C IV ions. Consequently C III and C IV UV lines are produced directly with comparable intensities. Some relative intensities of observable lines are calculated.
Key words: atomic processes atomic data X-rays: general ultraviolet: general
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© European Southern Observatory (ESO) 1997