Cross sections of proton-induced reactions on natGd with special emphasis on the production possibilities of 152Tb and 155Tb

Abstract

Cross sections and physical yields are presented for various Tb radionuclides formed in the bombardment of natGd with protons, from their respective thresholds up to 66 MeV. New measurements are compared with theoretical predictions by means of the geometry-dependent hybrid (GDH) model as implemented in the code ALICE/ASH, as well as with previous literature experimental data, where available. Based on the agreement between the experimental results and the theoretical predictions, integral thick-target yields are also derived for the 152Gd(p,n) 152Tb, 155Gd(p,n) 155Tb and 155Gd(p,4n) 152Tb reactions forming the medically important 152gTb (SPECT) and 155Tb (PET) radionuclides. Based on the agreement between the experimental results and the theoretical predictions, integral thick-target yields are also derived for the 152Gd(p,n) 152Tb, 155Gd(p,n) 155Tb and 155Gd(p,4n) 152Tb reactions forming the medically important 152gTb (SPECT) and 155Tb (PET) radionuclides