Gamma-ray imaging with the Compton-backscattered laser photons

Gamma-ray imaging using a quasi-monochromatic and energy-tunable photon beam was performed. The photon was produced by the laser-Compton backscattering of 300-800 MeV electrons with laser photons. Radiographs of several objects were measured using 3-20 MeV quasi-monochromatic photons.