engleski

Low-dose environmental dosimetry using Thermo- and Optically Stimulated Luminescence

Within this study five different types of material were used as luminescence dosimetry phosphors for recording environmental radiation doses. The material was TLD400 and TLD500 phosphors, quartz from two different geological origins (quartzite rock veins and quartz sand) and salt and the techniques were Thermo- and Optically- Stimulated -Luminescence. The phosphors were buried within homogenised and sieved natural soil for periods ranging from 1 to 19 weeks. The luminescence analysis examined for signal sensitivity, dose response and signal growth. The results report well measured doses of only some weeks when using Optical Luminescence besides the well studied TLD400/500 phosphors also for quartz and salt samples. With Thermoluminescence, only TLD400/500 could reliably monitor doses corresponding to some weeks. The study concludes that quartz and salt could be routinely used as dosimetry phosphors to correctly estimate doses resulted from only some months of average to low radiation environments.

thermoluminescence; optically stimulated luminescence; dosimetry; TLD400; TLD 500; quartz; quartz-sand; salt

Proceedings of the 10th International Symposium on Radiation Physics - ISRP 10 Coimbra, Portugal 17-22 September 2006 Edited by M.I. Lopes, J.E. Fernández, W.L. Dunn and M.M.R. Costa