File:Collisional radiative model for neutral helium.png

Summary
Created by Scott Collis (me) using information from various papers in particular Sasaki, S., Takamura, S., Watanabe, S., Masuzaki, S., Kato,T., and Kadota, K. (1996). Helium i line intensity ratios in a plasma for thediagnostics of fusion edge plasmas. Review of Scientific Instruments, 67(10):3521-3529.