Development of neutron scattering kernels for cold neutron reflector materials

The newest neutron scattering applications are highly intensity-limited techniques that demand reducing the losses between source and detectors. In addition, nuclear industry demands more accurate data procedures for design optimization of advanced fission reactors, especially treatment fuel moderator materials. To meet these demands, it is necessary to improve existing calculation tools, through generation better models describe interaction neutrons with systems interest. Neutron Physics Department at Centro Atomico Bariloche (CNEA, Argentina) has been developing over time new slow materials, produce kernels cross section in thermal cold energy region. Besides studies carried out on moderators, we have recently begun looking materials could serve as efficient reflectors those ranges. this work present results transmission experiments diamond nanopowder magnesium hydride, simultaneously VESUVIO spectrometer (ISIS, UK), compare them newly generated cross-section libraries.