Abstract
AbstractA major disadvantage of dose reconstruction by means of thermoluminescence (TL) is the fact that during readout of any TL material exposed to ionizing radiation (i.e., during measuring the glow curve), the radiation-induced signal gets lost. Application of the photo-transferred thermoluminescence phenomenon (PTTL) may offer a solution to this problem. In PTTL, the residual signal that is not destroyed by conventional TL readout (because it comes from deeper electron traps) can be readout through simultaneous stimulation by UV light and heating, allowing to obtain information about the absorbed dose in a second run. The present paper describes the application of PTTL for emergency dose assessment. For this, MTS-N thermoluminescent detectors (LiF: Mg, Ti) were exposed using a high-energy Clinac 2300 medical linear accelerator to doses of 100 mGy, 300 mGy, 500 mGy, 700 mGy and 1000 mGy. Irradiation with UV radiation allowed the determination of the optimal heating time of 3 h, while the optimal temperature was identified to be 70 °C. The results obtained demonstrated the usefulness of the PTTL method for emergency dose assessment. The efficiency of the PTTL method was determined as 19%. Finally it was found that the detector background after UV exposure should not be underestimated during routine dose measurements.
Funder
Ministerstwo Nauki i Szkolnictwa Wyższego
Publisher
Springer Science and Business Media LLC
Subject
General Environmental Science,Radiation,Biophysics
Reference16 articles.
1. Abraham A, Weinstein M, German U, Alfassi ZB (2007) On the reassessment of doses in TL-dosimetry by measuring the residual dose. Radiat Prot Dosim 125:113–116
2. Abraham A, Weinstein M, German U, Alfassi ZB (2008) Reassessment of doses in TLD-100 after long storage times. Radia Meas 43:802–804
3. Alexander CS, McKeever SWS (1998) Phototransferred thermoluminescence. J Phys D: Appl Phys 31:2908–2920
4. Alexander CS, Morris MF, McKeever SWS (1997) The time and wavelength response of phototransferred thermluminescence in natural and synthetic quartz. Radiat Meas 7:153–159
5. Bhasin BD, Kalyane GN, Kathuria SP, Sunta CM (1987) Interference of intrinsic UV response of LiF: Mg, Ti (Poland) pellets in dose reassessment. Radiat Prot Dosim 20:181–185
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