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B. Jansky,Z. Turzik,E. Novak,M. Svadlenkova,M. Barta,L. A. Trykov,A. I. Blokhin 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
The leakage neutron and gamma spectra measurements have been done on benchmark spherical assembly-nickel sphere with diameter of 50 cm. The Cf-252 neutron sources with different emissions were placed into the centre of nickel sphere. The proton recoil method was used for neutron spectra measurement using stilbene crystals and hydrogen proportional counters. The neutron energy range of spectrometer was from 0.02 to 17 MeV. The gamma pulse shape discrimination method has been applied in stilbene measurements. The gamma energy range of spectrometer was from 0.1 to 10 MeV. The fine structure of gamma spectrum was measured by HPGe spectrometer. The experimental data were compared to results of transport calculations based on different evaluated nuclear data libraries (ENDF/B-VII.0, JENDL-3.3, JEFF-3.1.1, TENDL-2009). The continuous energy Monte Carlo transport calculation code MCNP-4C was employed for the calculations. Main observed differences between experiments and transport calculations are discussed.