METHOD OF PRODUCING NANOSTRUCTURED TARGET FOR PRODUCING MOLYBDENUM-99 RADIOISOTOPES

摘要

FIELD: nuclear engineering; technological processes.;SUBSTANCE: invention relates to reactor technology of producing molybdenum-99 radioisotope (⁹⁹Mo), which is a base for creation of radioisotope technetium-99m of generators (^99mTc). Method of producing target for production of radioisotope molybdenum-99 is carried out by reacting ⁹⁸Mo(n,γ)⁹⁹Mo flowing in a stream of slow neutron nuclear reactor, using a matrix-buffer of mesoporous inorganic materials, in channels which are fed molybdenum compounds. Production of target is carried out by impregnation of sorbent Al₂O₃ with specific surface area of 200 m²/g with ammonium paramolybdate solution (NH₄)₆Mo₇O₂₄ and subsequent thermal treatment in a stream of oxygen, resulting in formation on surface of channels of a nanolayer of MoO₃. Average thickness of nanolayers MoO₃ applied in series into channels is set by number of applications and is limited by effective diameter of channels. After irradiation separation containing core recoil buffer Al₂O₃ and starter nanoparticles MoO₃ is achieved by elution of more than 97 % MoO₃ from target with 20 % solution of ammonia in water.;EFFECT: obtaining a uniform distribution of molybdenum in volume of Al₂O₃ during precipitation of molybdenum coating on surface of its mesopores, simple method of making a target, higher efficiency of producing ⁹⁹Mo due to creation of nanolayers over entire volume of matrix, achieving high homogeneity of “nanolayer-Mo - buffer” with high efficiency of using starting material and collection of recoil atoms.;3 cl, 1 tbl, 1 ex