Radical change of spin precession frequency of ultrarelativistic electrons in the field of circular polarized wave under the effect of interaction with radiation field

Interaction with radiation field is shown to result in increase by several orders of precession frequency of ultrarelativistic electrons in circularly polarized wave and to change essentially the character of its dependence on electron energy and wave frequency. That increase may be really observed in powerful laser and intercrystalline fields starting from energies equal to several GeV. 8 refs.; 1 fig