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Production of $$^{67}$$Cu for cancer therapy using fast neutrons from $$^{nat}$$C(d,n) reaction

Hashimoto, Kazuyuki; Kawabata, Masako; Saeki, Hideya; Tsukada, Kazuaki  ; Sato, Nozomi*; Motoishi, Shoji*; Nagai, Yasuki; Watanabe, Satoshi; Ishioka, Noriko

Copper-67 is an attractive radionuclide for cancer therapy, because of emissions of medium energy $$beta$$ particle (a mean energy of 141 keV) and $$gamma$$ rays (91, 93, 185 keV) suitable for imaging, and its appropriate half-life (62 hours). However, the use of $$^{67}$$Cu for clinical researches has been limited due to the difficulty in obtaining sufficient quantities. In this study, we have investigated the production of $$^{67}$$Cu by the $$^{68}$$Zn(n,x)$$^{67}$$Cu reaction (x = n'p, d) using fast neutrons from $$^{nat}$$C(d,n) reaction. The highly purified $$^{67}$$Cu was obtained by the two columns separation method (chelate resin chelex-100 and anion exchange resin AG1-X8). Furthermore, the labelling of DOTA and TETA which are useful bifunctional ligands for the labelling monoclonal antibodies was succeeded in more than 97% yield.

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