Ukrainian Nuclear Data Centre: Progress report, 2003/04

The Ukrainian Nuclear Data Centre (UKRNDC) is subdivision within the Neutron Physics Department at the Institute for Nuclear Research of the National Academy of Sciences of Ukraine. UKRNDC has 6 permanent researchers. The staff is partly involved in the experimental investigations of neutron cross sections at Kyiv Research Reactor. The Data Centre continues the collection and compilation of experimental neutron data published by Ukrainian researchers. They also started to compile the experimental charged particle data. After compilation of numerical data and related information using EXFOR format they are sent to NDS IAEA to be included to EXFOR library. The collaboration with the Laboratory of Engineering and Technology (LET) of the Chornobyl Center for Nuclear Safety, Radioactive Waste and Radioecology (CCNSRWR), Slavutych is continued in scientific support of the Slavutych Nuclear Data Bank and its users. This work is supported by the Science and Technology Center in Ukraine. In collaboration with the Physical Department of the Kyiv National University a teaching course on 'Nuclear Data for Science and Technology' was given in 2003-2004 for graduate course students of NPD KNU. A collaboration with the Lawrence Livermore National Laboratory was started to determine the neutron standard cross sections with high accuracy. In frame of this activity the measurements of total, total scattering and angle scattering neutron cross sections at reactor neutron filtered beams with energies in the range from 2 up to 144 keV on carbon samples will be performed. During 2003-2004 the data for users requests were prepared and adapted (from ENDF, ENSDF and EXFOR libraries) for our institute researchers and for customers from other institutes. The total neutron cross section and its self-shielding values for Cr-52 were measured at Kyiv Research Reactor using Neutron Filter Technique. The accuracy of measured cross sections was better than 2%. These data for neutron energies 24 and 58 keV were compared with the data from ENDF libraries and presented at the ND2004. The total neutron cross sections for natural carbon were measured using neutron filtered beams with accuracy better than 1% at average energies 24, 59 and 148 keV at the Kyiv Research Reactor