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The emission of slow positrons from magnesium oxide powder

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Abstract

From Monte Carlo analyses of measured time-of-flight spectra for slow positrons traveling down a tube which is first evacuated and then filled with low-density helium gas, it is shown that the positrons leave the MgO-coated source grid at angles close to the normal direction. This result is important for low-energy positron collision studies. An interpretation of the result based on the surface charge held by the oxide is proposed.

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Authors and Affiliations

  1. Center for Positron Studies, The University of Texas at Arlington, 76019, Arlington, TX, USA

    P. G. Coleman & J. A. Conly

Authors
  1. P. G. Coleman
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  2. J. A. Conly
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Coleman, P.G., Conly, J.A. The emission of slow positrons from magnesium oxide powder. Appl. Phys. 25, 269–271 (1981). https://doi.org/10.1007/BF00902981

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  • DOI: https://doi.org/10.1007/BF00902981

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