“…Approximate form of K(u, β) for arbitrary β is given in Appendix B. Earlier, a similar expression for the case β ≫ 1 was given in 19 in terms of the Luttinger parameters γ 2 and γ 3 for the limiting case of ∆ 0 → ∞ with application to the problem of Auger recombination and in 37 . Substituting ( 17) into (8) for I cv (q i , q 3 ), we obtain explicit expression for the quadratic term in the impact ionization rate, namely…”