Application of the Sunna dosimeter film in gamma and electron beam radiation processing

The OSL (optically stimulated luminescence) based Sunna film containing a m icrocrystalline dispersion of LIF in a polymer matrix has been recently int roduced for high-dose dosimetry. Our previous investigations revealed the a pplicability of the system in the dose range of 0.01-100 kGy, but irradiati on temperature and dose rate effects above 5 kGy reduced its usefulness. Th e recent discovery of the use of spectrophotometric analysis in the UV rang e for measuring doses above 5 kGy is a suitable option, while the OSL analy sis can be applied for measuring lower doses due to the lack of temperature effect on the response of the film below 1 kGy. The film can be applied bo th in gamma and electron fields, although its response to the two types of radiation is somewhat different. No significant effects of UV light and hum idity have been found, and effects of irradiation temperature are only sign ificant in the case of OSL analysis for doses above 5 kGy. The applicabilit y of two types of Sunna films in electron and gamma radiation processing is discussed in the paper. (C) 2000 Elsevier Science Ltd. All rights reserved .