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Positronium formation from porous silica in backscattering and transmission geometries

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Abstract

The Aarhus positron beam line is utilised to measure the positronium formation fraction from porous silica thin films created by the Glancing Angle Deposition technique. The highest formation fraction found from these studies in a backscattering geometry is (57.7 ± 1.0)% in good agreement with other measurements. In transmission mode, the maximum positronium output is found to be (12.5 ± 0.5)%. These are the first measurements of positronium formation in transmission of a porous silica thin film, a starting point for future attempts to optimise the positronium formation in transmission.

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Authors and Affiliations

  1. Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, Denmark

    Søren L. Andersen, Rasmus R. Johansen, Jakob B. Overgaard, Johan K. Mortensen, Kristoffer K. Andersen, Heine D. Thomsen, Mikkel D. Lund, Jacques Chevallier, Helge Knudsen & Ulrik I. Uggerhøj

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  1. Søren L. Andersen
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  2. Rasmus R. Johansen
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  3. Jakob B. Overgaard
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  5. Kristoffer K. Andersen
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  8. Jacques Chevallier
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  9. Helge Knudsen
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  10. Ulrik I. Uggerhøj
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Correspondence to Søren L. Andersen.

Additional information

Contribution to the Topical Issue “Electron and Positron Induced Processes”, edited by Michael Brunger, Radu Campeanu, Masamitsu Hoshino, Oddur Ingólfsson, Paulo Limão-Vieira, Nigel Mason, Yasuyuki Nagashima and Hajime Tanuma.

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Andersen, S.L., Johansen, R.R., Overgaard, J.B. et al. Positronium formation from porous silica in backscattering and transmission geometries. Eur. Phys. J. D 68, 124 (2014). https://doi.org/10.1140/epjd/e2014-40762-x

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  • DOI: https://doi.org/10.1140/epjd/e2014-40762-x

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