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  • 1 High Energy Accelerator Research Organization Oho1-1 Tsukuba, Ibaraki 305-0801 Japan
  • | 2 High Energy Accelerator Research Organization (KEK) Radiation Science Center Oho 1-1 Tsukuba, Ibaraki 305-0801 Japan
  • | 3 Tokyo Institute of Technology Research Laboratory for Nuclear Reactors Ookayama, Meguro-ku, Tokyo 152-8550 Japan
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Although the estimation of 14C radioactivity is very important from a radiation safety viewpoint at high-intensity and high-energy accelerator facilities, it is very difficult, since there is little information concerning the production cross sections by high-energy nuclear reactions. In this work, the 14C production cross section was measured for the nuclear spallation reaction of aluminum with 12-GeV protons. The chemical separation method of 14C was also studied.