H - O charge exchange
look at paper Spirko et al 2003 http://adsabs.harvard.edu/abs/2003JPhB...36.1645S
possibly update?
Cloudy & Associates
look at paper Spirko et al 2003 http://adsabs.harvard.edu/abs/2003JPhB...36.1645S
possibly update?
Photoionization simulations since 1978