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The capability of Free-Electron Lasers to generate photon beams with recordperformances in the domain of MeV-class photon energy for nuclear photonicsapplications is here analyzed. We discuss possible nuclear FEL working points.Some typical situations are presented and simulated by means of thethree-dimensional code GENESIS 1.3. The losses by spontaneous emission and bywakefield induced energy spread are then evaluated. The calculations show thepossibility of generating FEL radiation at 1-4 MeV with less than 300 eV ofbandwidth with not prohibitive set up requirements, achieving therefore regimeswhere no other kind of gamma ray sources could arrive.

High energy Free Electron Laser for nuclear applications