Abstract: | Sections of nonlinear photon-photon scattering processes ![gamma](/content/n1864065j1152l87/xxlarge947.gif) ![gamma](/content/n1864065j1152l87/xxlarge947.gif) and merger of photons in the nucleus ![gamma](/content/n1864065j1152l87/xxlarge947.gif) (Ze) (Ze) in a strong magnetic field are computed by using a developed two-dimensional formalism. Closed expressions are obtained for the sections with a graphical illustration of the results and they are compared with the case of no external fields.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 6, pp. 16–19, June, 1988. |