Production cross sections of astatine isotopes 207−211 At in the 29–57 MeV 7 Li + nat Pb reaction have been measured by α- and γ-ray spectrometry. Excitation functions of production cross sections have been compared with a statistical calculation to study the reaction mechanism of the 7 Li + nat Pb reaction. Production reactions of 207−211 At in the 7 Li + nat Pb have been derived. Considerably small experimental cross sections of 210 At and 209 At compared with the statistical calculation were clearly observed at incident energies higher than 44 MeV, indicating that the effects of breakup reaction play a role. A chemical separation of astatine from an irradiated lead target has been studied with a dry-distillation method. A complementary way to produce astatine isotopes has been developed.
Production cross sections of astatine isotopes At in the 29–57 MeV Li + Pb reaction have been measured by α- and γ-ray spectrometry. Excitation functions of production cross sections have been compared with a statistical calculation to study the reaction mechanism of the Li + Pb reaction. Production reactions of At in the Li + Pb have been derived. Considerably small experimental cross sections of At and At compared with the statistical calculation were clearly observed at incident energies higher than 44 MeV, indicating that the effects of breakup reaction play a role. A chemical separation of astatine from an irradiated lead target has been studied with a dry-distillation method. A complementary way to produce astatine isotopes has been developed.
The radionuclide Cu-67 was produced via the Zn-68(p,2p)Cu-67 reaction by irradiating enriched Zn-68 targets with 70 MeV proton beam. Copper-67 was chemically separated from the zinc target by ion-exchange chromatography using Chelex-100 chelating ion-exchange resin. Procedure for recovery of the enriched Zn-68 was developed. The target recovery yield of this method was evaluated to be more than 97%.
The radionuclide 67 Cu was produced via the 68 Zn(p,2p) 67 Cu reaction by irradiating enriched 68 Zn targets with 70 MeV proton beam. Copper-67 was chemically separated from the zinc target by ion-exchange chromatography using Chelex-100 chelating ion-exchange resin. Procedure for recovery of the enriched 68 Zn was developed. The target recovery yield of this method was evaluated to be more than 97%.
