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The production of  235 Np and  236 Pu by the reactions  236 U( p ,2 n )  235 Np and  236 U( p , n β − )  236 Pu using the K-130 cyclotron of the University of Jyväskylä was investigated. The cross sections for the reactions were determined. Thick-target yield curves were derived based on the cross sections. The results are discussed and compared with previous data on other reactions leading to the formation of the same end products. The thick-target yield of  235 Np in the  236 U( p ,2 n ) reaction is about 50 percent higher than the yield obtained in the  238 U( p ,4 n ) reaction leading to this nuclide at comparable particle energies. The purity of  236 Pu produced in the  236 U( p , n β − ) reaction is more than ten times better than for earlier known as the purest reaction  237 Np( p ,2 n + pn β − )  236 Pu.

Production of 234,235 Np and 236 Pu in bombardment of 236 U with protons in the energy range from 17 to 40 MeV