title: Production of 77Kr and 79Kr for medical applications via proton irradiation of bromine: excitation functions, yields and separation procedure.
abstract: Excitation functions were measured for the formation of both 77Kr and 79Kr by interaction of protons with bromine of natural isotopic composition. The theoretical yields are 62.8 mCi/muAh for 77Kr in the energy range from 45 to 32 MeV, with 1.5% 76Kr and 11.7% 79Kr impurities, and 14.9 mCi/muAh for 79Kr in the energy range of 45 to 0 MeV, respectively. The experimental yield after dry distillation separation of the krypton isotopes from irradiated NaBr targets, lies between 40 and 60% of the theoretical ones. Below the melting point of NaBr, krypton is released by diffusion, caused by lattice defects in the target material.
mesh_terms: D001966:Bromine; D007726:Krypton / Q000302:isolation & purification; D010315:Particle Accelerators; D011522:Protons; D011868:Radioisotopes / Q000302:isolation & purification
chemical_list: D011522:Protons; D011868:Radioisotopes; D007726:Krypton; D001966:Bromine