The use of molybdenum oxide nanoparticles for production of free isotope Mo-99

• Date: 2015
• Main Authors: Dikiy, N.P., Dovbnya, A.N., Krasnoselsky, N.V., Lyashko, Yu.V., Medvedeva, E.P., Medvedev, D.V., Uvarov, V.L., Fedorets, I.D.
• Format: Article
• Language: English
• Published: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2015
• Series: Вопросы атомной науки и техники
• Subjects: Применение ядерных методов
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/112374
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: The use of molybdenum oxide nanoparticles for production of free isotope Mo-99 / N.P. Dikiy, A.N. Dovbnya, N.V. Krasnoselsky, Yu.V. Lyashko, E.P. Medvedeva, D.V. Medvedev, V.L. Uvarov, I.D. Fedorets // Вопросы атомной науки и техники. — 2015. — № 6. — С. 154-156. — Бібліогр.: 11 назв. — англ.

The possibility of photonuclear production of ⁹⁹Mo medical radioisotopes using recoil nuclei of nanoparticles MoO₃ from reaction ¹⁰⁰Mo(γ,n)⁹⁹Mo was investigated. (γ,n)-reaction does not be accompanied by change in nuclear charge. Therefore, the enrichment of radioactive isotopes is being carried out using methods based on the effect of Szilard-Chalmers. The highest concentration of ⁹⁹Mo is required for manufacturing of ⁹⁹mTc-⁹⁹Mo generators. These generators will promote successful using ⁹⁹mTc in nuclear medicine. MoO₃ nanoparticles of size 13…80 nm were placed in isopropyl alcohol and ethylene glycol. The colloidal solution of MoO₃ is achieved by sonication. The colloidal solution of nanoparticles of MoO₃ was irradiated by bremsstrahlung with Emax = 12.5 MeV. The recoil nuclei of ⁹⁹Mo were separated by means of diantipyrylmethane in sulfuric acid solution. Yield of ⁹⁹Mo from extractable phase amounted ~ 4%, in consequence of the high density of MoO₃ nanoparticles in a colloidal solution.