Gvi

The vector n which enters into the Eq. 2.8.46 coincides in this case with the vector n (see Eq. 2.8.19a). The Eq. 2.8.48 for the anisotropic random field changes into the expression for A± calculated in Toptygin (1973, M1983).

In the case in which the scattering time ts is large, Eq. 2.8.42 reduces to the diffusion equation (Toptygin, 1973, M1983):

dN (r, t )/dt = Vxa(K,Mam + *w)Vr2N(r, t). (2.8.50)

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