Publication Date:
2015-12-30
Description:
Publication date: Available online 29 December 2015 Source: Radiation Measurements Author(s): A.I. Surdo, R.M. Abashev, I.I. Milman, E.V. Moiseykin The results of a comparative research of thermoluminescence (TL) of TLD-500 detectors based on anion-defective corundum irradiated with continuous and pulsed X-ray and pulsed electron beams in a range of doses of 0.3 ÷ 10 7 Gy, dose rates of 0.02 – 2.6·10 11 Gy/s, and in a temperature range of 300 – 950 K are presented. It is found that, in contrast to continuous irradiation, upon pulsed irradiation with a duration of 10 ns and dose rate of P P ≥5·10 6 Gy/s, the first linear region of dose dependences for TL peaks at 450, 580 and 830 K is, instead of saturation, followed by a second one with a smaller slope at doses near 2, 200 and 10 3 Gy. Moreover, the slope of the second region increases with growing P P . It was also found that dose dependence for the peak at 830 K in the area of the first linear region at 10-10 3 Gy remains invariable at P P ≤10 10 Gy/s. It is shown that the upper limit of doses registered by TLD-500 detectors can be increased to 2·10 3 and 6·10 6 Gy for continuous and pulsed irradiation, respectively. New broadband UV luminescence with a maximum hν=4.1 eV and half width H=0.85 eV was registered within the TL peak spectrum at 830 K. Besides, the optical depletion spectrum in which a single band with hν=5.2 eV and H=1.6 eV is observed was investigated for a trap causing a peak at 830 K.
Print ISSN:
1350-4487
Electronic ISSN:
1879-0925
Topics:
Electrical Engineering, Measurement and Control Technology
,
Physics
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