Investigation of OSL signal of resistors from mobile phones for accidental dosimetry

• Published in: Radiation measurements Vol. 71; pp. 466 - 470
• Main Authors: Mrozik, A., Marczewska, B., Bilski, P., Gieszczyk, W.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Kidlington Elsevier Ltd 01.12.2014; Elsevier
• Subjects: Accidental dosimetry; Alumina ceramics; Earth sciences; Earth, ocean, space; Exact sciences and technology; Geochronology; Isotope geochemistry. Geochronology; Optically stimulated luminescence; Portable electronic devices; Resistors; Resistors; Optically stimulated luminescence; Alumina ceramics; Accidental dosimetry; Portable electronic devices; gamma rays; OSL; networks; irradiation; homogeneity; alumina; luminescence; materials; temperature
• ISSN: 1350-4487; 1879-0925
• DOI: 10.1016/j.radmeas.2014.05.004

Resistors from mobile phones, usually located near the human body, are considered as individual dosimeters of ionizing radiation in emergency situations. The resistors contain Al2O3, which is optically stimulated luminescence (OSL) material sensitive to ionizing radiation. This work is focused on determination of dose homogeneity within mobile phones which was carried out by OSL measurements of resistors placed in different parts inside the mobile phone. Separate, commercially available resistors, similar in the shape and size to the resistors from circuit board of the studied mobile phone, were situated in different locations inside it. The irradiations were performed in uniform 60Co and 137Cs radiation fields, with the mobile phones connected and not connected to the cellular network. The dose decrease of 9% was measured for original resistors situated between circuit board and battery, in comparison to the dose at the front of the phone. The resistors showed the lower signal when the mobile phone was connected to the cellular network, due to higher temperature inside the housing. The profile of fading was investigated within 3 month period for resistors irradiated with 1 Gy of gamma rays to estimate of the fading coefficient. •Impact of a mobile phone mode (switched on/off) on absorbed dose by resistors was showed.•The influence of the temperature during irradiation on absorbed dose was measured.•Dose distribution inside of a mobile phone was performed.•Fading factor of resistors was calculated.