The invention relates to a method for producing 99mTc, consisting of the following steps a solution (11, 21, 31) comprising 100Mo-molybdate-ions is used a proton beam (15) having an energy which is suitable for inducing a 100Mo (p, 2n) 99mTc-nuclear reaction when exposing 100Mo-molybdate-ions is used the solution is exposed to the proton beams (15) and a 100Mo(p, 2n) 99mTc-nuclear reaction is induced an extraction method for extracting the 99mTc from the solution is used. The invention also relates to a device for producing 99mTc, comprising a solution (11, 21, 31) with 100Mo-molybdate-ions an accelerator for providing a proton beam with energy which is suitable for inducing a 100Mo (p, 2n) 99mTc-nuclear reaction when exposing 100Mo-molybdate-ions for exposing the solution and for inducing a 100Mo(p, 2n) 99mTc-nuclear reaction an extraction step (19) for extracting 99mTc from the solution.
