Verification of a non-diffusing gel dosimeter

J. B. Davies, S. G. Bosi, C. Baldock

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An evaluation of the diffusion coefficient of a genipin-gelatin gel dosimeter was carried out by fitting an inverse square root function to image profile data. A comparison was made with a Fricke-gelatin-xylenol orange (FGX) gel dosimeter, in which the ions are known to diffuse. The diffusion coefficient for this FGX gel, consisting of 0.5 mM ferrous ammonium sulphate, 50 mM sulphuric acid, 0.15 mM xylenol orange and 3% by weight gelatin was 0.70±0.05 mm² h⁻¹ at 5 Gy. The genipin-gelatin gel consisted of 50 μM genipin, 4% by weight gelatin and 100 mM sulphuric acid. The fitted parameter that is proportional to the diffusion coefficient did not significantly change over time, demonstrating that this genipin-gelatin gel is a non-diffusing dosimeter.
Original languageEnglish
Pages (from-to)012040-1-012040-4
Number of pages4
JournalJournal of Physics: Conference Series
Publication statusPublished - 2013
EventInternational Conference on 3D Radiation Dosimetry (7th : 2012) - Sydney
Duration: 4 Dec 20128 Dec 2012

Bibliographical note

Copyright the author(s). This paper was published in Journal of physics: conference series, Vol. 444, 012040. The original paper can be found at Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.


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