Production study of high specificactivity NCA Re-186g by proton and deuteron cyclotron irradiation

Very high specific activity(AS) 186gRe could be produced by either proton or deuteron cyclotron irradiation on highly enriched 186W target in no-carrier-added (NCA) form, leading to a AS very close to the theoretical carrier free (CF) value of 6.88 GBq/ug. Thick target yields(TTYs), obtained irradiating both thick metal W targets of natural isotopic composition and highly enriched pressed powdered 186W targets, were measured at different particles energies taking into account high accuracy and precision on both yield and beam energy. The measurement of radionuclidic purity of 186gRe obtained activating highly enriched 186W by both p and d beams were also carried out and accurately compared. The excitation function as thin-target yields (tty, i.e. proportional to the reaction cross-sections) and the integrated TTYs for all Re (A=181, 182,183,184,186 and their metastable levels), W and Ta co-produced radionuclides will be presented else where in deep details.