Light-ion production in 175 MeV quasi-monoenergetic neutron-induced reactions on iron and bismuth and comparison with INCL4 calculations

Nuclear data for neutron-induced reactions in the intermediate energy range of 20 to 200 MeV are of importance for several different applications, notably accelerator-driven incineration of nuclear waste. The Medley setup located at The Svedberg Laboratory in Uppsala, Sweden was used for a series of measurements of p, d, t, 3 He and alpha particle production from 175 MeV neutrons on various target nuclei. Medley uses an arrangement of 8 detector telescopes placed at angles from 20 to 160 degrees relative to the neutron beam to register event and discriminate among the particle types. Using the ΔE-ΔE-E technique we were able to measure double-differential cross sections over a wide dynamic range. This paper describes the experimental set-up, summarizes the data analysis and reports on recent changes in the previously reported preliminary data set on bismuth. Experimental data are compared with several different model calculations. In this paper we specifically compare the experimental results with INCL4 intra-nuclear cascade calculations combined with the ABLA de-excitation code. Considering the fact that the experimental data are obtained at an energy normally considered too low for intra-nuclear cascade calculations, we do find some systematic difference but generally reasonable agreement.