[3N01-03] Nuclear Data Measurement 1

[3N03] Neuton-induced cross-section measurement of hydrogen containing materials: o-xylene, p-xylene and m-xylen

*Masahide Harada¹, Yutaka Abe², Makoto Teshigawara¹, Motoki Ooi¹, Yujiro Ikeda³, Kenichi Oikawa¹, Seiko Kawamura¹, Yasuhiro Inamura¹ (1. JAEA, 2. Kyoto Univ, 3. RIKEN)

Keywords:Hydrogenous material, Cross section measurement, Temperature dependence, J-PARC, NOBORU, AMATERAS

Hydrogenous materials are mainly applied as a moderator material used in high-intense and small neutron sources because of good moderating characterization for neutrons. Scattering data including total cross sections of cold-thermal neutrons are important to characterize moderators. However, as some measurements are old, we have been continuously and systematically measuring the cross sections of hydrogenous materials since 2018 for a new neutron source development. In this presentation, the measurements of o-xylene, p-xylene and m-xylene carried out in 2020 and 2021 will be presented as a hydrogenous material. The measurements were performed at NOBORU and AMATERAS in MLF of J-PARC. The total cross sections were measured at NOBORU, and the scattering cross sections were measured at AMATERAS. The sample temperatures were 20, 100, 200, 300 K and temperatures near the melting point. The sample was contained in an aluminum cell. The time-of-flight method was used to measure the energy-dependent transmission of the sample. The scattering data was converted to the scattering cross section by a multiple energy chopping. Details will be reported on the day.