- #1

HeavyIon

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Is it possible to use the Saha equation?

##\frac{n_en_i}{n_a}=\frac{g_eg_i}{g_a}*3*10^{21} T^{3/2} e^{-J/T}##

Using the search, I found the McWhirter criterion for the applicability of the formula above:

##n_e >>1.6*10^{12}T^{1/2}*\Delta E^3##

Here ##n_e## is the electron density in ##cm^{-3}##, T is the electron temperature in ##eV##, and ##\Delta E## is the largest energy gap between upper and lower energy states that corresponds to one of the spectral lines used. I don't quite understand what \Delta E value should be considered in my case? I'm getting singly charged helium.