Characteristic of titanium tungstate gels and its influence rhenium-188 released

Titanium tungstate (TiW) gels is generator ¹⁸⁸W/¹⁸⁸Re matrix material for production of radioisotope rhenium-188 (¹⁸⁸Re). Titanium tungstate gels obtained by the way of reaction titanil and tungsten from abundance of natural isotope. Characteristic of titanium tungstate gel was controlled covers comparison of mol Ti:W, pH and heating reaction, is purpose of research which will be studied. Production of gel which will be done by the way "Pre-formed" applied target WO₃ non radioactive. Target WO₃ is made by solution of ammonium tungstat (NH4)₂WO₄ is reacted with titanium tetrachloride ( TiCl₄), obtained condition of optimum in the form of gels with Ti:W = 1:0.7 mol comparison, pH 6 and heating reaction at temperature 60 °C. Gel is having white colour is dried at temperature 80 °C and 130 °C during three hours. Characterization with X-RD indicates that titanium tungstate gels character has form of structure amorf. Identification of gels with FTIR shows absorption peaks at 3600-3000 cm^-1 from bunch -OH that bond with titanium and bond between W-OH shown to absorption 1600 cm^-1 which is weak, other peaks at absorption 600-1100 cm^-1 for absorption from W-O. Identified to applied SEM method is obtained rough particle, crumbly and homogen. Gel irradiated in reactor at neutron flux ≈ 10⁴ n/cm²/s during 89 hours, packing in columns equipped "sintered glass". Radionuclide ¹⁸⁸Re formed elusion by 0,15 M NaCl, pH 5 solution, obtained result of elusion (yield) is 60 %, radiochemical purities more than 95 %. (author)