Measurement of Cross Sections of Reactions \({}^{191}\)Ir(\({{p},{pxn}}\))\({}^{189,190}\)Ir,\({}^{193}\)Ir(\({{p},{pn}}\))\({}^{192}\)Ir, and \({}^{191}\)Ir(\({{p},{xn}}\))\({}^{188,189}\)Pt and Cumulative Cross Sections of Reactions \({}^{191}\)Ir(\({{p},{n}}\))\({}^{191}\textrm{Pt}+{}^{193}\)Ir(\({{p},3{n}}\))\({}^{191}\)Pt during Irradiation of Natural Iridium Target with \({}^{1}\)H Nuclei

Abstract

This article addresses measurement of the cross sections of the reactions \({}^{191}\)Ir(\(p,pn\))\({}^{190}\)Ir, \({}^{193}\)Ir(\(p,pn\))\({}^{192}\)Ir, \({}^{191}\)Ir(\(p,4n\))\({}^{188}\)Pt, \({}^{191}\)Ir(\(p,3n\))\({}^{189}\)Pt, and \({}^{191}\)Ir(\(p,p2n\))\({}^{189}\)Ir and the cumulative cross section of the reaction \({}^{193}\)Ir(\(p,3n\))\({}^{191}\textrm{Pt}+{}^{191}\)Ir(\(p,n\))\({}^{191}\)Pt in the proton energy range of 29.6–17.2 MeV during proton irradiation of a target of natural metal iridium on the U-150 cyclotron of the National Research Center (NRC) Kurchatov Institute. The experimental cross sections of the reactions were compared with data of TENDL-2023. The results of this study make it possible to evaluate the effectiveness of the production of the target radioisotope \({}^{189}\)Ir, a precursor in a \({}^{189}\textrm{Ir}/{}^{189m}\)Os isotope generator of an Auger emitter and conversion electrons from \({}^{189m}\)Os, which can be used as a low-dose therapeutic agent in nuclear medicine. Experimental cross sections of the formation of accompanying radionuclide impurities enable development of an optimal radiochemical technique for release of the radioisotope \({}^{189}\)Ir from a proton-irradiated iridium target.