The production of 139Pr and 139Ce in proton-induced reactions

[摘要] Excitation functions and production rates are presented for various Ce and Pr radionuclidesformed in the bombardment of 141Pr, natLa and natCe with protons. Extensive measure-ments were performed for 141Pr + p up to 100 MeV and for natLa + p up to 20 MeV. Thepossibility is investigated to utilize tandem targetry for the production of no-carrier-added139Ce of high radionuclidic purity, having a Pr target in the higher energy slot followedby a La target in a lower energy slot. 141Pr(p,3n)139mNd!139Pr is investigated as an al-ternative to the direct production route 140Ce(p,2n)139Pr for producing no-carrier-added139Pr of high radionuclidic purity. The advantages and disadvantages of both productionroutes are discussed. The simultaneous production of 139Pr and 140Nd using Pr as targetis also investigated. Experimental thick-target production rates are presented for Pr ra-dionuclides formed in the bombardment of natCe with protons at incident energies of 20, 26and 32 MeV. All the experimental excitation functions obtained in this work are comparedwith theoretical predictions by means of the geometry-dependent hybrid (GDH) model asimplemented in the code ALICE-IPPE. The results of this work are also compared withprevious literature experimental data, if available.

[发布机构] Stellenbosch University