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The reaction of 4He(γ, p)3H in the range of giant resonance was studied by a streamer chamber method in a magnetic field irradiated with polarized photons obtained by plane channeling of electrons by a diamond crystal. The angular and energetic dependences of the asymmetry of the cross section have been measured. The results are explained by the mechanism of direct knock out of nucleons.

The paper discusses the use of Compton backscattering of an intense laser light on a relativistic electron beam to produce high-intensity γ beams, and also the practicability of the concept. Requirements on the parameters of electron and photon beams are described, and the lattice of the electron storage ring with a beam energy up to 150 MeV is proposed, wherein experiments on intense photon beam generation and laser cooling of the electron beam can be conducted. Electron beam parameters in the storage ring are calculated with due regard for the intrabeam scattering, photon beam parameters are also estimated. The scheme of experiment that enables the production of a photon beam with an intensity of ~10 13 s -1 is proposed.