Abstract
Boron filter with 500 mg/cm2 surface density has been constructed and used for epithermal neutron activation analysis of geological and biological materials. Bare and boron-covered irradiations were performed to determine the boron activation ratios (R B ) and improvement factors (IF B ) for 23 nuclides. Biological and geological SRMs were also analyzed to demonstrate the practical use of this technique. Experiments have proved that epiboron activation extends the applicability of NAA to samples with unfavorable matrices (i.e., Na, Ca, P, Sc, etc.).
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