The excitation and ionixation of He I in the solar atmosphere is computed for a range of values of n and T# and the radiation field in the resonance lines Good agreement is found between the observed and computed parameters for T and n 1011. The criterion for the X 10830 and x 5876 lines to show as emission lines against the solar disk is found to be fle > 1012 almost independently of Te.
No takes yet. Share an insight, caveat, or question.
Athay et al. (1960) studied this question.