Abstract
Relative sensitivity factors (RSF) are studied for impurity elements in metal samples with the use of laser mass spectrometry in the power density range of 1 to 3 × 109 W cm−2 for the focused laser beam. Metallic impurities are found to have RSFs near unity, while nonmetallic impurities are less efficiently ionized relative to iron. The results indicate uniform sensitivities for all the elements may be expected as the power density reaches 5 × 10' 109 cm−2, in agreement with earlier studies.
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