METHOD AND TARGET FOR PRODUCING RADIO TIN IN CARRIER-FREE STATE

FIELD: nuclear technology and radiochemistry; extracting radioactive isotopes for medicine. ^ SUBSTANCE: proposed method for producing radio tin in carrier-free state involves irradiation of targets incorporating metal antimony in the form of solid monolithic sample, 2-30 mm thick, in sealed shell by accelerated charged-particle flux of high intensity, this being followed by extraction of radio tin in carrier-free state from irradiated antimony. Sealed shell can be made of high-alloy austenitic steel, hot-rolled molybdenum, or nonporous graphite. Irradiated metal antimony is dissolved in concentrated HX acid, where X = F, Cl, or Br, doped with concentrated nitric acid; dibutyl ether saturated with HX acid solution is added to solution obtained and the latter is divided into aqueous and organic phases. Sodium citrate is added to aqueous phase formed after antimony extraction, excess of hydrogen ions is neutralized by alkali, and solution obtained is passed through chromatographic column filled with hydrated silicon dioxide. Hydrated silicon dioxide is washed to remove traces of antimony and of tellurium and indium radioisotopes by sodium citrate and water doped with citric acid, and carrier-free radio tin is desorbed from hydrated silicon dioxide by mineral acid. ^ EFFECT: enhanced yield of carrier-free radio tin at high activity. ^ 22 cl, 5 dwg