Abstract
Sample-related corrections for average neutron capture cross section measurements are complicated in the keV region due to the resonance structure. In particular, light mass nuclei present in chemical compounds of rare earth materials make corrections for neutron multiple-scattering and self-shielding difficult. Moreover, samples of chemical compounds such as oxides are hygroscopic. A Monte Carlo method has been developed by taking into account the effects caused by neutron slowing down into the resonance region due to the scattering from hydrogen and oxygen atoms. The validity of the calculated corrections has been investigated by comparing experimental data of oxide and metallic samples. The calculation method and related problems will be discussed.
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