Abstract
A new beam line for photonuclear reaction experiments using tagged photons has been constructed to take advantage of the completion of the 1.2-GeV STretcher Booster (STB) ring at the Laboratory of Nuclear Science (LNS), Tohoku University. A photon tagging system was installed at the end of the new beam line. It provides bremsstrahlung tagged photon beams in an energy range from 0.2 E 0 to 0.8 E 0 MeV at the incident electron energy E 0 with an energy resolution of Δ E / E ≈ 10 - 2 . The tagged photon intensity I ⩽ 5 × 10 6 photons / s is available for typical photonuclear reaction experiments. We introduce the basic parameters of the tagged photons by showing the commissioning data.
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