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The proton rich  97 Ru, a potential candidate for nuclear medicine, was produced for the first time through the  nat Nb( 7 Li,3 n ) 97 Ru reaction. A natural Nb foil of 20ߙmg/cm 2  thickness was irradiated with 32ߙMeV  7 Li beams to attain the yield of ∼1ߙMBq/μAߙh for  97 Ru. The no-carrier-added  97 Ru was separated from the bulk niobium by liquid–liquid extraction (LLX) and solid–liquid extraction (SLX) techniques. Liquid cation exchanger, di-(2-ethylhexyl)phosphoric acid (HDEHP) dissolved in cyclohexane was used in LLX and solid cation exchanger, DOWEX-50 was used for SLX in HCl. The LLX technique was found to be superior to the SLX technique with respect to radiochemical yield and purity of the radionuclide  97 Ru.

Production and separation of 97 Ru from 7 Li activated natural niobium