Modelling instrumental response for neutron scattering experiments at CSNS
Modelling instrumental response for neutron scattering experiments at CSNS
Ni Yang 1Zi-Yi Pan 2Ming Tang 2Wen Yin 2Xiao-Xiao Cai2
作者信息
- 1. University of Chinese Academy of Sciences;Spallation Neutron Source Science Center;Institute of High Energy Physics, Chinese Academy of Sciences
- 2. Spallation Neutron Source Science Center;Institute of High Energy Physics, Chinese Academy of Sciences
- 折叠
摘要
Thermal neutron total scattering experiments of light and heavy water were reproduced using the CSNS in-house Monte Carlo thermal neutron transport code, Prompt, with a focus on the instrumental detector response and the accurate derivation of thermal neutron scattering cross-sections. In this work, a data reduction method is developed to process both the measured and simulated detector events for estimating angular, wavelength distributions, as well as angular differential cross sections. The reduction results of simulations and experiments show a high degree of consistency. The prominent inelasticity signatures observed in the experiments can be accurately reproduced in simulations. We discuss the cause of the inelasticity effects, and demonstrate the elimination of such effects when the inelastic scattering process is taken into account in simulations. In addition, multiple scattering in samples is analysed and discussed.
Abstract
Thermal neutron total scattering experiments of light and heavy water were reproduced using the CSNS in-house Monte Carlo thermal neutron transport code, Prompt, with a focus on the instrumental detector response and the accurate derivation of thermal neutron scattering cross-sections. In this work, a data reduction method is developed to process both the measured and simulated detector events for estimating angular, wavelength distributions, as well as angular differential cross sections. The reduction results of simulations and experiments show a high degree of consistency. The prominent inelasticity signatures observed in the experiments can be accurately reproduced in simulations. We discuss the cause of the inelasticity effects, and demonstrate the elimination of such effects when the inelastic scattering process is taken into account in simulations. In addition, multiple scattering in samples is analysed and discussed.关键词
Neutron transport/ Thermal neutron cross-section/ Neutron total scattering/ Neutron instrument/ Monte Carlo simulationKey words
Neutron transport/ Thermal neutron cross-section/ Neutron total scattering/ Neutron instrument/ Monte Carlo simulation引用本文复制引用
Ni Yang,Zi-Yi Pan,Ming Tang,Wen Yin,Xiao-Xiao Cai.Modelling instrumental response for neutron scattering experiments at CSNS[EB/OL].(2026-05-12)[2026-05-14].https://chinaxiv.org/abs/202605.00093.学科分类
物理学
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