H I rydberg level populations
This is to open a discussion with results for the problem with the departure coefficients in the highest levels. The attached sim is the baseline model.
Tests reveal the following: Honly - b at the highest n, 90, is 9.9 H He only = 6.5 all elements = 3.3
photoionization is much closer to one than collisional ionization. This should not matter for such highly ionized gas. H onlyl Photo T=5 b=5.7 coronal T=5, b =9.9