High-temperature thermoluminescence of anion-deficient alumina and possibilities of its application in high-dose dosimetry

摘要

Results of studies of the thermoluminescence (TL) of anion-deficient alumina (alpha-Al2O3 - delta) single crystals and based on them TLD-500 detectors exposed to pulsed X-ray and electron radiation in a wide range of doses D, pulsed dose rates P (p) , and temperatures are described. The TL responses of alpha-Al2O3 - delta for continuous and pulsed X-ray irradiation at D = 0.05-150 Gy are compared. Unlike continuous irradiation, in the case of pulsed irradiation at P (p) a parts per thousand yen 6 x 10(6) Gy/s, a linear increase in the TL response as a function of D is registered in the main and "chromium" peaks at 450 and 580 K, respectively, with a decrease in the slope of the dose dependence at D > 2 Gy for the peak at 450 K. It is found that high-dose irradiation (> 60 Gy) leads to the formation of a new TL peak at 830 K and the preferential redistribution of the stored light sums into this peak. The dose dependence for the TL peak at 830 K is studied. It is established that it is linear in a super-high dose range of 10(4) to 6 x 10(6) Gy at P (p) = 2.6 x 10(11) Gy/s.