Bound Free (Overview)
Source
Photonization data in SIROCCO is gennerally obtained from two sources
The Opacity project. See also Cunto et at 1993, A&A, 275, L5
or
Verner & Yakovlev 1995 : Inner and Outer Shell Cross-sections
Verner et al. 1996 : Improved Outer Shell Cross-sections-
Details of how each type of photonionzation x-section is treated can be found in