Experimental Studies of the Medical Radioisotopes Production in Neutron Spectra Generated by 660 MeV Protons and 1-8 GeV Deuterons in Massive Uranium Target

The possibility of medical radionuclide Cu-64,Cu-67 production in spallation neutron spectrum induced by proton and deuteron beams has been studied. Experiments were performed on a massive natural uranium target at the accelerators Phasotron and Nuclotron JINR, Dubna. The main disadvantage of this method is a high Cu-64/Cu-67 ratio in the final product at EOB. Significantly reduce Cu-64/Cu-67 ratio is only possible if you use zinc target enriched with Zn-68 or Zn-67. The MCNPX simulation of Cu-67,Cu-64 production and definition of the theoretical limit of the specific activity of Cu-67,Cu-64 by irradiation of natural zinc and zinc enriched by the 68 isotope were performed. The neutron flux density shouldnot be less than 5.10(13) n/cm(2)/s if we want to obtain high specific activity (>200 GBq/mg) of Cu-67.