Measurements of Double-Differential Cross Sections of Charged-Particle Emission Reactions for Several Structural Elements of Fusion Power Reactors by 14.1-MeV Incident Neutrons

A two-dimensional energy and time-of-flight charged-particle spectrometer has been developed and used to measure the double-differential cross-section (DDX) data of (n, xp) and (n, x) reactions for several elements with 14.1-MeV incident neutrons at OKTAVIAN, the Intense 14-MeV Neutron Source Facility of Osaka University. The DDX data of the ⁵¹V(n, xp), ⁵¹V(n, x), ^natFe(n, xp), ^natFe(n, x), ⁵⁹Co(n, xp), ⁵⁹Co(n, x), ^natNi(n, x), ^natCu(n, x), ⁹³Nb(n, xp), ⁹³Nb(n, x), and ^natMo(n, xp) reactions are measured. The angle-integrated energy differential cross-section (EDX) data were deduced from the measured DDX data and compared with other experimental results [except for the ⁵⁹Co(n, xp) reaction] and evaluated nuclear data of JENDL fusion file (JENDL-FF). A comparison was also done with the ENDF/B-VI for the total reaction cross sections of all measured reactions except for the ^natMo(n, xp) reaction and the EDX of the ^natNi(n, x) and ^natCu(n, x) reactions. The theoretical calculations were done by using the SINCROS-II code. The measured data agreed fairly well with other data for almost all the reactions. The JENDL-FF and SINCROS-II data underestimate the measured EDX data for the reactions of ⁹³Nb(n, x) and ^natMo(n, xp). For the ^natFe(n, xp), ^natFe(n, x), ⁵⁹Co(n, x), and ^natNi(n, x) reactions, smaller data are given than other data, i.e, other experimental data, JENDL-FF, and ENDF/B-VI. The SINCROS-II code can reproduce well for both the proton and alpha-particle emission cross-section values.