ИСТИНА

To construct detectors for future low background experiments, a lot of ultra-pure construction materials will be needed. Our studies of various Ti samples have shown that the levels of radioactive contaminations (U and Th) in commercially available industrial titanium can vary from 0.2 to 100 mBq/kg. If the way to produce titanium in the tons scale with very low level of contaminations (below ~1 mBq/kg of U and Th) would be developed, than the titanium will become extremely promising material. Our study of the titanium sponge production process (Kroll-process) aims at finding sources of U and Th contaminations and their migration during multistage process. To understand U and Th migration during the Kroll process, we have studied a distribution of other impurities by means of precise ICP-MS analysis. Preliminary results have confirmed that the Kroll process could be used for ultra pure titanium sponge production. The further production stages of metal titanium parts with necessary mechanical properties from titanium sponge need to be additionally studied.