The angular spectrum ofspontaneous radiation from crossed electric and magnetic field E0 × B0 drifting electronsis derived on the basis of the classical single-particle motion equations and theradiative law of the electron with accelerated motion. The result is applicable to thosecases of the nonrelativistic and the relativistic electron incidence. The spontaneousradiation for the energy factor γ0 = 1 and γ0》1 is discussedparticularly.