3KeV H irradiation to Li/Pd/Cu trilaminar neutron production target for BNCT

Ishiyama, Shintaro; Fujii, Ryo*; Nakamura, Masaru*; Imahori, Yoshio*

The Li/Pd/Cu trilaminar structures of the synthesized target for BNCT were characterized under 3keV H irradiation by XPS and XAFS technique, which provides structural/electronic properties of solids, and information about the local structure, such as the nature and number of surrounding atoms and inter-atomic distances. Following conclusions were derived; (1) Pd-Cu physical bonding was produced between the Pd and Cu interface by electro-less plating Pd deposition on a high purity Cu plate (2) From the XAFS observation of white line of Pd, the Pd 3 Edge jump was found after H irradiation, this fact indicates increase of hole density in Pd 4-band. (3) 0.9 eV chemical shift was also observed in Pd 3 white line for Pd/Cu samples, which will affect the quality of the Li/Pd/Cu target due to the formation of PdH in palladium insert layer.