New cross section measurements for neutron-induced reactions on Cr, Ni, Cu, Ta and W isotopes obtained with the activation techniqueV. Semkova1, 2, R. Capote3, R. Jaime Tornin1, A.J. Koning4, A. Moens1 and A.J.M. Plompen1
1 European Commission, DG-Joint Research Centre, Institute for Reference Materials and Measurements, 2440 Geel, Belgium
2 Institute for Nuclear Research and Nuclear Energy, 1784 Sofia, Bulgaria
3 International Atomic Energy Agency - Nuclear Data Section, P.P. Box 100, 1400 Vienna, Austria
4 Nuclear Research and Consultancy Group NRG, P.O. Box 25, 1755 ZG Petten, The Netherlands
Published online: 21 May 2008
Herein we report on 50Cr(n,x)48V, 58Ni(n,pα)54Mn, 58Ni(n,x)56Co, 63Cu(n,pα)59Fe, 181Ta(n,α)178mLu, 181Ta(n,α)178gLu, 181Ta(n,x)180mHf, 181Ta(n,p)181Hf, 181Ta(n,2n)180gTa, 182W(n,p)182Ta, 183W(n,x)182Ta, 183W(n,p)183Ta, 184W(n,x)183Ta, 184W(n,α)181Hf, 184W(n,p)184Ta, 186W(n,α)183Hf, 186W(n,x)185Ta, 186W(n,p)186Ta, and 186W(n,2n)185mW reaction cross section measurements using the activation technique. The irradiations were carried out at the 7-MV Van de Graaff accelerator at IRMM, Geel. Quasi monoenergetic neutrons with energies between 13.8 and 20.5 MeV were produced via the 3H(d,n)4He reaction at Ed = 1, 2, 3, and 4 MeV. Both natural and samples enriched in 182W, 183W, 184W, and 186W were used to facilitate correction for interference between reactions leading to the same product. Standard γ-ray spectrometry was employed for the measurement of the radioactivity. In addition to the standard detector efficiency calibration a Monte Carlo simulation of the coaxial HPGe detector was performed with the MCNP5 code in order to achieve higher geometry flexibility and better accuracy. The measured results are compared with work by other authors, current evaluated data files, TALYS and EMPIRE calculations using consistent parameter sets.
© CEA 2008