METHOD OF PRODUCING NANOSTRUCTURED TARGET FOR PRODUCTION OF MOLYBDENUM-99 RADIOISOTOPE

FIELD: physics.SUBSTANCE: invention relates to reactor technology of producing molybdenum-99 radioisotope (Mo), which serves a base for creation of radioisotope technetium-99m generators (Tc). This method includes production of molybdenum-99 radioisotope at reactionMo(n,γ)Mo, carried out in a stream of slow neutron nuclear reactor and is carried out using a matrix-buffer of mesoporous inorganic materials, which channels are supplied with molybdenum compounds. Production of target is carried out by impregnation of activated carbon with specific surface area more than 300 m/g of ammonium paramolybdate solution (NH)MoOand subsequent heat treatment, as a result, on the surface of the channels nano-layers MoOare formed. Fraction of recoil atomsMo, leaving layers MoOand localized in the buffer depends on thickness of applied layers. Average thickness of nanolayers MoOapplied in series into channels is set by number of applications and is limited by the effective diameter of channels. After irradiation the separation of core recoil containing activated carbon and starter nanoparticles MoOis achieved by elution of more than 97% MoOfrom the target 20% solution of water ammonia. Following the process of extracting cores recoil of a matrix is implemented by gasification of coal component of the matrix by combustion.EFFECT: technical result provides simple method of making the target, higher efficiency of producingMo due to creation of nano-layers over the entire volume of the matrix, which enables to achieve high homogeneity of "nanolayer-Mo - buffer", providing efficient use of the starting material and increases efficiency of collecting recoil atoms, obtaining a uniform distribution of molybdenum in the volume of activated carbon during precipitation of molybdenum coating on surface of its mesopores.3 cl, 1 ex Изобретение относится к реакторной технологии получения радиоизотопа молибден-99 (Мо), являющегося основой для создания радиоизотопных генераторов технеция-99m (Tc). В заявленном способе производство радиоизотопа молибден-99 по реакцииМо(n,γ)Мо, осуществляемой в потоке тепловых нейтронов ядерного реактора, проводится с использованием матрицы-буфера из мезопористых неорганических материалов, в каналы которой вносят соединения молибдена. Изготовление мишени производится пропиткой активированного угля с удельной поверхностью более 300 м/г раствором парамолибдата аммония (NH)MoOи последующей термообработкой, в результате чего на поверхности каналов образуются нан