Development of reuse of Mo-100 Irradiation Sample for Production of Medical Radio Isotope Tc-99m Using DT neutrons.

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In Japan, almost all of medical radio isotopes are imported from foreign countries. To produce them in Japan, new routes using accelerator-based neutron sources have been developed. In this study, 99Mo which is the mother nuclide of a medical isotope 99mTc was focused. With the new routes, since the specific activity of the product is low, we cannot use commonly-used separate extraction method. Therefore, we developed a separation extraction apparatus based on sublimation method. For the production routes because expensive enriched 100Mo have to be used, it is important to reuse 100Mo sample. Therefore, in this study, impurities that are contaminated through separate extraction procedure were measured. Finally we found how to reuse the sample.