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Relative Ionization Yields for Impurity Elements in Laser Mass Spectrometry of Steels and Brasses

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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 × 109 W cm−1, in agreement with earlier studies.

Keywords: Analysis of solids; Laser ionization; Mass spectroscopy; Nd:YAG lasers

Document Type: Research Article


Affiliations: Ames Laboratory-U.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011

Publication date: May 1, 1987

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