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  • Empfindlichkeiten, Nachweisgrenzen, 10 mCi-Am(241)-Quelle  (1)
  • PACS. 32.80.Dz Autoionization - 78.40.Kc Metals, semimetals, and alloys - 78.70.Dm X-ray absorption spectra  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 12 (1999), S. 171-178 
    ISSN: 1434-6036
    Keywords: PACS. 32.80.Dz Autoionization - 78.40.Kc Metals, semimetals, and alloys - 78.70.Dm X-ray absorption spectra
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Magnetic circular dichroism in lanthanide 4 f photoemission (PE) multiplets was studied across the 4 d-4 f excitation threshold for the example of Tb metal. The combined experimental and theoretical analysis demonstrates that resonant enhancement of the 4 f PE signal and large magnetic contrast in the PE intensity are obtained simultaneously, when the excitation energy is tuned to the absorption-edge maximum for parallel orientation of magnetization and circular-polarization light helicity.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 280 (1969), S. 109-114 
    ISSN: 1618-2650
    Keywords: Analyse von Wasser ; Röntgenfluorescenz-Spektrometrie ; Empfindlichkeiten, Nachweisgrenzen, 10 mCi-Am(241)-Quelle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary Seven trace elements ranging from chromium to barium were preconcentrated on Amberlite IR-120 cation exchange paper and determined in an energy dispersive X-ray fluorescence system using a 10 mCi241Am source. Sensitivities were experimentally determined and checked with theoretically calculated values. The detection limits are compared with elemental levels present in typical surface waters and those allowed in drinking water. Appropriate conclusions as to feasibility of such a system for environmental monitoring are drawn.
    Notes: Abstract Sieben Spurenelemente im Bereich von Chrom bis Barium wurden auf Amberlite IR-120 Kationenaustauschpapier angereichert und durch energiedispersive Röntgenfluorescenzanalyse mit einer 10 mCi241Am-Quelle bestimmt. Die Übereinstimmung der experimentell gemessenen mit den theoretisch berechneten Empfindlichkeiten wird geprüft. Die Nachweisgrenzen werden verglichen mit den in typischen Oberflächengewässern vorkommenden und den in Trinkwasser maximal erlaubten Elementkonzentrationen. Die Möglichkeit der Anwendung in der Umweltanalytik wird diskutiert.
    Type of Medium: Electronic Resource
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