Experimental and computer simulation study of radionuclide production in heavy materials irradiated by intermediate energy protons

摘要

The results of measurements and computer simulations are presented for the yields of residual product nuclei in thin targets: ~(nat)U irradiated by 0.1, 0.8, 1.2, and 1.6 GeV and ~(99)Tc irradiated by 0.2, 0.8, 1.0, 1.4, and 1.6 GeV protons. The yields were measured by direct high-precision γ-spectrometry. The irradiations were made using the beams extracted from the ITEP U-10 synchrotron. The majority of these yields are measured for the first time at such energies. We think that these new data on high energy fission yields measured together with spallation land fragmentation products are of importance both for development of new reliable models of intermediate energy nuclear reactions and to benchmark available codes used today in applications. About 820 cross sections are presented and used in comparison between measured yields and simulations by the LAHET, INUCL, CEM95, HETC, CASCADE, YIELDX, and ALICE codes.