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Diffusion constant and surface states of positrons in metals

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Abstract

Positron lifetime spectra and angular correlation curves for seven fine-grained powders of Fe, Co, Ni, and W are analyzed. From the lifetime data, the positron diffusion constant in metals atT=300°K was found to beD +=(1.0±0.5)×10−2 cm2 sec−1. Evidence is presented that positrons are trapped in metal surface states.

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Authors and Affiliations

  1. Institut National des Sciences et Techniques Nucléaires Saclay, France

    Robert Paulin & Roger Ripon

  2. New York University, 10003, New York, N. Y., USA

    Werner Brandt

Authors
  1. Robert Paulin
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  2. Roger Ripon
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  3. Werner Brandt
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Paulin, R., Ripon, R. & Brandt, W. Diffusion constant and surface states of positrons in metals. Appl. Phys. 4, 343–347 (1974). https://doi.org/10.1007/BF00928390

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  • DOI: https://doi.org/10.1007/BF00928390

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