Benchmarking of evaluated nuclear data for uranium by a 14.8 MeV neutron leakage spectra experiment with slab sample

An experimental system for benchmarking of evaluated nuclear data by a 14.8 MeV neutron leakage spectra measurement with slab sample has been setup at China Institute of Atomic Energy (CIAE). The first measurement of the neutron leakage spectra from a 10 × 10 × 5 cm pure uranium slab sample at 45° and 135° was reported. The experimental results were compared with the calculated ones by MCNP-4C simulation, using the evaluated data of uranium from the CENDL3.0, ENDF/B-VII and JENDL3.3 libraries. This work shows that the apparatus and the data processing procedures work well. And more experiments will be done in the future for benchmarking of the evaluated data, especially for the CENDL data.