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Positron and positronium studies of silica aerogel


Reference:

Edwardson, C. J., Grogan, M. D. W., Birks, T. A. and Coleman, P. G., 2011. Positron and positronium studies of silica aerogel. Journal of Physics: Conference Series, 262 (1), 012018.

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Official URL:

http://dx.doi.org/10.1088/1742-6596/262/1/012018

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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.

Details

Item Type Articles
CreatorsEdwardson, C. J., Grogan, M. D. W., Birks, T. A. and Coleman, P. G.
DOI10.1088/1742-6596/262/1/012018
Related URLs
URLURL Type
http://dx.doi.org/10.1088/1742-6596/262/1/012018Free Full-text
DepartmentsFaculty of Science > Physics
RefereedYes
StatusPublished
ID Code23202
Additional Information12th International Workshop on Slow Positron Beam Techniques for Solids, Surfaces, Atoms and Molecules, SLOPOS12. 1-6 August 2010. Magnetic Island, QLD, Australia.

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