GAMMA-RAY SPECTROMETRIC CHARACTERIZATION OF WASTE ACTIVATED TARGET COMPONENTS IN A PET CYCLOTRON *

Irradiation of a target in a PET cyclotron creates high activity induced species in its components. In this work, a nuclide identification and activity evaluation of some activated target parts by high resolution gamma-ray spectrometry with HPGe detectors has been performed. Because of the high activity of some target components, a suitable collimation lead-walled system has been realized. Such system allows us to realize a gamma-ray spectrometric measurement of a small element of the target part at a remarkable distance from the detector, to put in comparison with the one of a calibrated point source of 152 Eu. Measurements on some target body components used inside an IBA Cyclone 18/9 cyclotron, allow the identification and activity evaluation for the most important radionuclides produced by activation of the materials.