The control analysis of boron by measurement of the transmission of radioisotope source neutrons

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Abstract
Boron at levels of between 0·1 and 10 per cent. has been determined nondestructively in bulk solids such as boron-aluminium alloys by measurement of the intensity of a transmitted neutron beam. The neutrons were produced from a 300-mCi 241Am-Be source and employed in an automatic instrumental system developed for use in a control laboratory at a rate of up to thirty-six samples per hour. The accuracy of such a technique has been shown to be good and the precision is better than ±1 per cent. The method is best applied to the determination of boron in matrices that have low thermal neutron absorption or scattering cross-sections.

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