Positron and positronium studies of silica aerogel


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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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.


Item Type Articles
CreatorsEdwardson, C. J., Grogan, M. D. W., Birks, T. A. and Coleman, P. G.
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URLURL Type Full-text
DepartmentsFaculty of Science > Physics
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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