Positron and positronium studies of silica aerogel

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

Research output: Contribution to journalArticle

2 Citations (Scopus)

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 languageEnglish
Article number012018
Number of pages4
JournalJournal of Physics: Conference Series
Volume262
Issue number1
DOIs
Publication statusPublished - 2011
Event12th 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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aerogels
positronium
positrons
silicon dioxide
positron annihilation
charging
gold
nanoparticles
energy
probes
sensitivity
matrices
spectroscopy

Cite this

Positron and positronium studies of silica aerogel. / Edwardson, Charlene J; Grogan, Michael D W; Birks, Timothy A; Coleman, Paul G.

In: Journal of Physics: Conference Series, Vol. 262, No. 1, 012018, 2011.

Research output: Contribution to journalArticle

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