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2017 | 132 | 5 | 1579-1584
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Positronium Formation in Nanostructured Metals

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Abstracts
EN
Positronium formation in Au films was studied using a magnetically guided continuous slow positron beam with variable energy. Black Au film with porous morphology was compared with conventional smooth Au film. In the smooth Au film positronium is formed on the film surface only. The black Au film exhibits porous sub-surface region containing micro-cavities interconnected with surface. Positronium is formed on inner surfaces of micro-cavities in the sub-surface region and travels through interconnected cavities towards the surface. 3-γ annihilation of ortho-positronium leaves a clear signature in two-dimensional coincidence Doppler broadening spectra. Measures of 3-γ annihilation contribution calculated from single γ-ray and coincidence Doppler broadening spectra were calculated and compared.
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Contributors
author
  • Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 18000, Praha 8, Czech Republic
author
  • Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 18000, Praha 8, Czech Republic
author
  • Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 18000, Praha 8, Czech Republic
author
  • Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 18000, Praha 8, Czech Republic
author
  • Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstr. 400, 01328 Dresden, Germany
author
  • Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstr. 400, 01328 Dresden, Germany
author
  • Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 182 21 Prague 8, Czech Republic
author
  • Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 182 21 Prague 8, Czech Republic
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv132n5p32kz
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