Computer Science
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990gecoa..54..875b&link_type=abstract
Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 54, March 1990, p. 875-881.
Computer Science
2
Iron Meteorites, Mass Spectroscopy, Meteoritic Composition, Osmium, Optical Resonance, Time Of Flight Spectrometers, Meteorites, Osmium, Concentration, Iron Meteorites, Ionization, Atoms, Resonance, Sputtering, Mass Spectrometry, Techniques, Metals, Analysis, Rims, Data, Samples, Meteorite, Procedure, Equipment, Experiments, Isotopic Ratios
Scientific paper
Resonance ionization of sputtered atoms followed by time-of-flight mass spectrometry was used for in situ quantitative measurement of Os with a spatial resolution of about 70 microns. A linear correlation between Os(+) signal intensity and the known Os concentration was observed over a range of nearly 10,000 in Os concentration with an accuracy of about + or - 10 percent, a minimum detection limit of 7 parts per billion atomic, and a useful yield of 1 percent. Resonance ionization of sputtered atoms samples the dominant neutral-fraction of sputtered atoms and utilizes multiphoton resonance ionization to achieve high sensitivity and to eliminate atomic and molecular interferences.
Blum Jacques
Calaway W. F.
Gruen D. M.
Hutcheon Ian D.
Pellin Michael J.
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