Validation of neutron data libraries by comparison of measured and calculated neutron leakage spectra

Abstract Neutron spectra from the 2 H(d,n) 3 He and 9 Be(d,n) 10 B neutron source reactions and a Pu–Be source were measured by a pulse height response spectrometer behind slabs of water, graphite, sand, Pb, Al and Fe up to 20 cm thicknesses. A comparison of the measured and the calculated data has given new results for the validation of different data libraries.