Interaction of esup(+-) with photons in magnetospheres of neutron stars

The dependence of the force of radiative slowing-down of relativistic electrons and positrons on their energy is studied for different elementary processes of interaction: Thomson, lompton, cyclotron scattering and e+- pair production. It is shown that these processes may exert significant influence on the acceleration of electrons and positrons by the electric field in magnetospheres of active neutron stars. The possibility of generation of hard gamma-ray radiation as a result of the processes considered as discussed and some astrophysical implications are presented