NeeVE vmecVE 21 V1 Vh2E V

Here Eph1 and E are the photon and electron energy before scattering;

is the photon energy after scattering; re = e2/mec2 is the classical radius of electron; v12 = 1 -3cos9,2; v = 1 -ficosd (3 = v/c is the electron velocity relative to the velocity of light; 9 is the angle between the photon momentum k1 and k2 before and after scattering; 91 and 92 are the angles between these momentums and the initial electron momentum p). Assume that the thermal photons are isotropic in space with the Planck distribution of the photon energy at a temperature Tph in energetic units):


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