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Multiple scattering has been well recognized as an important correction in neutron scattering cross-section measurements. The GEANT4 simulation toolkit includes a special thermal neutron scattering model and a corresponding data library at low neutron energies (<4 eV). A new method using GEANT4 to estimate the multiple-scattering effect in thermal neutron scattering experiments is presented. The method was applied to the double differential cross-section measurements of light water with various sample thicknesses under ambient conditions of temperature and pressure. The resulting scattering law for neutron energy transfer from 42.0 to 14.6 meV over scattering angles from 10° to 110° is presented and compared with the tabulated Evaluated Nuclear Data File (ENDF/B-VII).
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Li et al. (2017) studied this question.
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