Temperature-averaged Gaunt factors calculated for κ = 10, 15, 25, and 50 (left panel), 100, 500, 1000, and 1200 (right panel) and MB (black line in both panels) distributions of electrons for the range 10−5 ≤ γ2 ≤ 1010. We note the slow approach ⟨gf f(γ2, u)⟩ to the Maxwellian values for u > 10 and γ2 < 10 for large values of the κ parameter.
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