Measured and Calculated Differential and Total Yield Cross-Section Data of 58Ni(n,x ) and 63Cu(n,xp) in the Neutron Energy Range from 2.0 to 15.6 MeV
Volume 128 · Number 1 · January 1998 · Pages 47-60
Technical Paper
C. Tsabaris, E. Wattecamps, G. Rollin, C. Papadopoulos
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Double-differential (n,xp) and (n,x) cross-section ratio measurements are performed at the 7-MV Van de Graaff accelerator laboratory for neutron energies between 2.0 and 15.6 MeV. The following reaction rate ratios are measured: 58Ni(n,x) to 27Al(n,), 58Ni(n,x) to 58Ni(n,p), 63Cu(n,xp) to 27Al(n,), and 63Cu(n,xp) to 58Ni(n,p). Protons or alphas are detected by  E-E-E telescopes under 14, 51, 79, 109, and 141 deg. The energy spectrum of the emitted particles and the angular yield distribution are measured. First, the measurements provide double-differential cross-section data for 27Al(n,) and 58Ni(n,p) by normalization to the known total yield reference cross-section values. Subsequently, the reaction rate ratios of 58Ni(n,x) and 63Cu(n,xp) to 27Al(n,) or 58Ni(n,p) provide double-differential cross sections of 58Ni(n,x) and 63Cu(n,xp) in b/(MeV sr). The measured double-differential cross-section data, the particle energy spectra, the angular distributions, and the total yield cross-section data are compared with measured data from literature and with nuclear reaction model calculations performed at the Institute for Reference Materials and Measurements with the computer codes STAPRE-H and EXIFON.
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