Spin light

The spin magnetic moment of an electron moving in an homogeneous magnetic field is a source of electromagnetic radiation. This radiation (spin light) shows up at high energies and it is available for measurements in contemporary electron accelerators. The spin light identification problem is considered when the spin radiation proceeds against the background of powerful synchrotron radiation, recoil effects, and other relativistic phenomena. A relativistic neutron is considered to be a source of pure spin radiation. The correspondence principle is formulated for spin radiation with and without the spin flip.