Abstract
ABSTRACT A test of 107Pd transmutation with macroscopic quantities was conducted. Palladium is an essential material for industrial use and is one of the nuclides targeted for recycling from spent nuclear fuel. Reasonable nuclear reaction paths for 107Pd and the cross-sections for proton- and deuteron-induced spallation in inverse kinematics have been investigated. However, a transmutation experiment using long-lived fission products (LLFPs) as the target would be required for an actual system. To effectively detect the reaction products of the 107Pd + d reaction, we prepared a material with a 107Pd-concentration of almost 100% by ion implantation. The implanted samples were irradiated for several days with deuterons produced by the AVF Ring Cyclotron at RIKEN RIBF. After cooling, gamma-ray measurements of the irradiated sample were conducted. These revealed 105Ag and 106mAg originating from the 107Pd + d reaction. Furthermore, 105Pd and 106Pd produced from transmutation of 107Pd were estimated using DCHAIN. The 107Pd in the irradiated samples were measured by ICP-MS. The isotopic ratios 105Pd/107Pd and 106Pd/107Pd obtained from the experimental results are consistent with those obtained by calculation using PHITS. Furthermore, the 107Pd transmutation using deuteron was verified.
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