[2A15-20] Neutron Source and Transport

[2A17] Analysis of thermal neutron scattering cross-sections of hydrogenous materials for searching novel cold moderators in a small neutron source

*Yutaka Abe¹, Shoichirou Okita¹, Seiji Tasaki¹, Masahiro Hino² (1. Department of Nuclear Engineering, Kyoto University, 2. Institute for Integrated Radiation and Nuclear Science, Kyoto University)

Keywords:Thermal neutron scattering, Cold neutron source, Hydrogenous materials, 1-propynyl group

For searching novel cold moderators, dozens of neutron scattering cross-sections for hydrogenous materials are analyzed by the general-purpose code for thermal neutron scattering cross-sections developed in our group. As a result, molecules having 1-propynyl groups are found to be promising cold moderators due to librational modes of methyl groups with an energy of several meV.