Presentation Information
[10a-E219-2]Preliminary Analysis of Thermal Neutron Scattering Cross-Section Data for LAB Scintillator Used in Reactor Neutrino Monitor
〇(M2)Teruo Nishibori1, Shoichiro Okita1, Kyohei Nakajima1 (1.Fukui Univ.)
Keywords:
Thermal Neutron,Neutrino Monitors
In neutrino detection experiments utilizing inverse beta decay reactions, linear alkylbenzene (LAB) has been widely adopted as a solvent in numerous detectors owing to its high optical transparency and handling safety. In such experiments, nuclear recoil events induced by ambient neutrons constitute a dominant background. Consequently, more accurate neutron scattering cross-section data for LAB can contribute to the development of efficient detectors and high-precision analyses. In the low-energy neutron scattering regime below the thermal energy, strong coupling with molecular motion becomes non-negligible; therefore, it is essential to evaluate neutron scattering cross-sections that account for molecular dynamics. In this presentation, we report the results of a preliminary analysis of thermal neutron scattering cross-section data for LAB, in which LAB was modeled in molecular dynamics simulations to compute the velocity autocorrelation function and the phonon density of states, which were subsequently used to derive the cross-section data.