Genipin, a fruit extract from Gardenia jasminoides Ellis, forms cross-links in solutions of gelatin, to form a blue hydrogel that bleaches quantitatively upon irradiation and the colour change can be measured with a spectrophotometer. With the addition of sulphuric acid this dosimeter is sufficiently sensitive for quality assurance of radiotherapy level dosimetry. Without sulphuric acid the gel has a reduced sensitivity and responds linearly with dose between 100 and 1000. Gy, making it potentially useful as a dosimeter for radiation processing applications such as the phytosanitary irradiation treatment of food. We investigated the dose response characteristics of this new formulation and found that the darker gels are more sensitive to dose and have a reduced uncertainty.

Item Type:	Refereed Article
Keywords:	gel dosimetry, genipin, colour change, dose response, fruit extracts, gel dosimeter, gel dosimetry, genipin, irradiation treatment, phytosanitary, radiation processing, reduced sensitivity, dosimeters, electron beam pumping
Research Division:	Physical Sciences
Research Group:	Medical and biological physics
Research Field:	Medical physics
Objective Division:	Health
Objective Group:	Other health
Objective Field:	Other health not elsewhere classified
UTAS Author:	Baldock, C (Professor Clive Baldock)
ID Code:	116130
Year Published:	2012
Web of Science® Times Cited:	16
Deposited By:	Strategic Research Funding
Deposited On:	2017-05-02
Last Modified:	2017-11-01
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