Positron and positronium studies of silica aerogel

Charlene J Edwardson; Michael D W Grogan; Timothy A Birks; Paul G Coleman

doi:10.1088/1742-6596/262/1/012018

Positron and positronium studies of silica aerogel

Charlene J Edwardson, Michael D W Grogan, Timothy A Birks, Paul G Coleman

Department of Physics

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4 Citations (SciVal)

Abstract

Variable-energy positron annihilation spectroscopy (VEPAS) has been used to probe the structure of gold nanoparticles suspended in a silica aerogel matrix by measuring the annihilation parameters S and W, and the ortho-positronium (o-Ps) fraction parameter F, as a function of incident positron energy. Correction methods have been developed to improve the sensitivity of F by removing background contributions to the number of recorded o-Ps annihilation events. Charging effects have also been observed and investigated.

Original language	English
Article number	012018
Number of pages	4
Journal	Journal of Physics: Conference Series
Volume	262
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/262/1/012018
Publication status	Published - 2011
Event	12th International Workshop on Slow Positron Beam Techniques for Solids, Surfaces, Atoms and Molecules, SLOPOS12, August 1, 2010 - August 6, 2010 - Magnetic Island, QLD, Australia Duration: 1 Jan 2011 → …

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10.1088/1742-6596/262/1/012018

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title = "Positron and positronium studies of silica aerogel",

abstract = "Variable-energy positron annihilation spectroscopy (VEPAS) has been used to probe the structure of gold nanoparticles suspended in a silica aerogel matrix by measuring the annihilation parameters S and W, and the ortho-positronium (o-Ps) fraction parameter F, as a function of incident positron energy. Correction methods have been developed to improve the sensitivity of F by removing background contributions to the number of recorded o-Ps annihilation events. Charging effects have also been observed and investigated.",

author = "Edwardson, {Charlene J} and Grogan, {Michael D W} and Birks, {Timothy A} and Coleman, {Paul G}",

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language = "English",

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journal = "Journal of Physics: Conference Series",

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T1 - Positron and positronium studies of silica aerogel

AU - Edwardson, Charlene J

AU - Grogan, Michael D W

AU - Birks, Timothy A

AU - Coleman, Paul G

PY - 2011

Y1 - 2011

N2 - Variable-energy positron annihilation spectroscopy (VEPAS) has been used to probe the structure of gold nanoparticles suspended in a silica aerogel matrix by measuring the annihilation parameters S and W, and the ortho-positronium (o-Ps) fraction parameter F, as a function of incident positron energy. Correction methods have been developed to improve the sensitivity of F by removing background contributions to the number of recorded o-Ps annihilation events. Charging effects have also been observed and investigated.

AB - Variable-energy positron annihilation spectroscopy (VEPAS) has been used to probe the structure of gold nanoparticles suspended in a silica aerogel matrix by measuring the annihilation parameters S and W, and the ortho-positronium (o-Ps) fraction parameter F, as a function of incident positron energy. Correction methods have been developed to improve the sensitivity of F by removing background contributions to the number of recorded o-Ps annihilation events. Charging effects have also been observed and investigated.

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U2 - 10.1088/1742-6596/262/1/012018

DO - 10.1088/1742-6596/262/1/012018

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VL - 262

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

IS - 1

M1 - 012018

T2 - 12th International Workshop on Slow Positron Beam Techniques for Solids, Surfaces, Atoms and Molecules, SLOPOS12, August 1, 2010 - August 6, 2010

Y2 - 1 January 2011

ER -

Positron and positronium studies of silica aerogel

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Positron and positronium studies of silica aerogel

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