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  • 1 Oak Ridge National Laboratory Analytical Chemistry Division 37830 Oak Ridge Tennesse (USA)
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X-ray fluorescence, using the fundamental parameters method for matrix correction, is used routinely for quantitative analysis in our group. The accuracy of this method has been demonstrated with a Nd:YAG (Nd:Y3Al5O12) laser crystal. The neodymium concentration was determined relatively to the yttrium concentration by X-ray fluorescence using241Am for excitation. The yttrium-aluminum ratio was confirmed by scanning electron microscopy (SEM-EDX). Although there was a 10% discrepancy for yttrium due to the uncertainty in the neutron capture cross-section, the fluorescence results for aluminum and neodymium were in very good agreement with neutron activation analysis (NAA) results. Based on this agreement, the Nd:YAG sample will be used in future NAA calibration measurements.