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Open Access Green as soon as Postprint is submitted to ZB.
Thermoluminescence of electronic components from mobile phones for determination of accident doses.
Radiat. Meas. 104, 13-21 (2017)
The dosimetric properties of resistor substrates extracted from the circuit board of mobile phones were studied in detail using Thermoluminescence for the purpose of dose reconstruction following a radiological accident or attack. Many studies have shown the usefulness of this material using Optically Stimulated Luminescence but TL studies are scarce. The typical glow curve of a set of irradiated resistors has a peak at about 170 °C. Unexposed resistors showed a strong zero dose signal in the higher temperature region, peaking between 300 and 350 °C, which also led to a minor zero dose being detected in the chosen integration window of 100-200 °C. Exposure to white light can significantly increase the zero dose, presumably due to phototransfer of charge carriers from deep traps into the dosimetric trap. The dose response of the TL signal was linear up to several Gy but an irreversible sensitivity change was observed in the first thermal readout. A correction factor was therefore deduced from a number of dose recovery tests. Similar to the OSL signal, the TL signal is not stable but fades with time since irradiation. Overall, a slightly smaller fading rate up to 60 days was observed for the TL signal, as compared to the OSL signal. A protocol is proposed for TL based on the measured properties and validated in irradiation trials.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Accident Dosimetry ; Electronic Components ; Mobile Phones ; Retrospective Dosimetry ; Thermoluminescence (tl); Retrospective Dosimetry; Osl Signal; Luminescence; Emergency; Glass; Tl
ISSN (print) / ISBN
1350-4487
e-ISSN
1879-0925
Journal
Radiation Measurements
Quellenangaben
Volume: 104,
Pages: 13-21
Publisher
Elsevier
Publishing Place
Oxford
Reviewing status
Peer reviewed
Institute(s)
Institute of Radiation Protection (ISS)