Performance-improvement in57Fe-DCEMS by an optimized scintillation counter

Zs Kajcsos, Ch Sauer, R. A. Brand, W. Zinn, R. Kurz, M. A.C. Ligtenberg, G. Van Aller

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Applications of DCEMS or ICEMS for UHV studies of surfaces and interfaces are often severely limited by long recording times. To clarify the practical means to shorten this time, we introduce the "statistical utility rate" α characterizing the statistical quality of a given measurement. By improving detection efficiency and reducing background contribution simultaneously, we have developed an extremely low-noise scintillation detector (Hamamatsu R1635-02 or R2557 photomultiplier with P-47 thin-layer phosphor). Performance comparison with a channeltron by57Fe-DCEMS measurements on an 90% enriched57Fe foil with 7.2 keV electrons reveals a measuring time gain over an order of magnitude in favour of the scintillation e-detector. Improvements achievable for samples with normal isotope abundance are higher than for enriched ones.

Original languageEnglish
Pages (from-to)707-714
Number of pages8
JournalHyperfine Interactions
Volume46
Issue number1-4
DOIs
Publication statusPublished - Mar 1 1989

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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  • Cite this

    Kajcsos, Z., Sauer, C., Brand, R. A., Zinn, W., Kurz, R., Ligtenberg, M. A. C., & Van Aller, G. (1989). Performance-improvement in57Fe-DCEMS by an optimized scintillation counter. Hyperfine Interactions, 46(1-4), 707-714. https://doi.org/10.1007/BF02398263