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Measurement of the stopping power of Au and MgF2 for slow muons

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Zeitschrift für Physik A Hadrons and Nuclei

Abstract

The spectral flux densityn(T) of μ− emerging from a Au or MgF2 moderator has been measured at low energiesT using time-of-flight. Fromn(T) the stopping powerS(T) of Au was determined for 2 keV≤T≤22 keV, and of MgF2 for 2 keV≤T≤12 keV. For Au,S(T) is smaller than calculated values obtained from proton atomic data practically in the wholeT range (Barkas effect); at lowT S(T) approaches the calculated values. For MgF2,S(T) agrees fairly with the calculated values above 5 keV and then drops below these values. We ascribe this dropping to the large energy gap of the MgF2 insulator.

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Author notes

  1. W. Neumann

    Present address: Hauptabteilung für die Sicherheit der Kernkraftwerke, Würenlingen, Switzerland

Authors and Affiliations

  1. Physik-Department, Technische Universität München, James-Franck-Strasse, W-8046, Garching, Germany

    W. Schott, H. Daniel, F. J. Hartmann & W. Neumann

Authors
  1. W. Schott
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  2. H. Daniel
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  3. F. J. Hartmann
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  4. W. Neumann
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Additional information

We wish to thank H. Angerer, H. Plendl, G. Schmidt, and C.A. Schug for help with the data taking, J. Homolka for computational help, H. Hagn, and H. Weiss for technical assistance and P. Maier-Komor and R. Scherrer for manufacturing the windows and targets. The hospitality of PSI and financial support by the German Bundesministerium für Forschung und Technologie are acknowledged.

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Schott, W., Daniel, H., Hartmann, F.J. et al. Measurement of the stopping power of Au and MgF2 for slow muons. Z. Physik A - Hadrons and Nuclei 346, 81–84 (1993). https://doi.org/10.1007/BF01290784

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  • DOI: https://doi.org/10.1007/BF01290784

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