Abstract

The method is based on measuring the neutron cross-section of a powdered sample at neutron wavelengths beyond its Bragg cutoff. The effect of the neutron beam broadening due to its transmission through the powder sample on cross-section was treated as small angle neutron scattering (SANS) cross-section. The SANS cross-section was determined as the difference between its measured cross-section in powder form and in bulk metal. At certain conditions the SANS cross-section values of powdered samples were found to be inversely proportional to the particle size. The methods was applied for particle size determination of iron powders. The accuracy in particle size was found to be 8%.

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