Experimental study of the thermoluminescence response of the display screen of mobile phones for accident dosimetry

Moslehi, Amir; Bagheri, Saeed; Payervand, Firouz

doi:10.24200/nst.2024.1677.2056

Experimental study of the thermoluminescence response of the display screen of mobile phones for accident dosimetry

Articles in Press

Document Type : Research Paper

Authors

Amir Moslehi ¹

Saeed Bagheri ²

Firouz Payervand ³

¹ Radiation Applications Research School, Nuclear Science and Technology Research institute, AEOI,, Tehran, Iran.

² Novin Radiation Therapy Institute, Tehran, Iran.

³ Novin Radiation Therapy Institute, Tehran, Iran

https://doi.org/10.24200/nst.2024.1677.2056

Abstract

In this work, display screen samples of five mobile phone models including Huawei-y7, Nokia6, Iphone5, Sony-c3 and Shiaomi-note were investigated in order to use for accident dosimetry. After separation and washing with HF acid and ethanol, pieces with dimensions smaller than 5 mm × 5 mm from each sample were prepared. The samples were irradiated with 60Co gamma rays of Theratron 780 irradiator with a few absorbed doses between 0.01 and 10 Gy. Thermoluminescence (TL) signal of each sample normalized to its mass was measured with a Harshaw 4500 reader from 50 to 300 oC with a rate of 5 oC s-1. Calibration curves obtained for the samples showed that for all models the signal intensity linearly increases with the dose. On the other hand, significant light and time fading were observed for the TL signals measured for all models. Therefore, it is necessary to investigate the samples in darkness as soon as possible after the accident. Overall, Iphone5 possessing the most signal intensity per unit absorbed dose and the least minimum measurable dose (MMD) value recognized as the most appropriate model for accident dosimetry between the models investigated.

Keywords

Thermoluminescence

display screen

mobile phone

accident dosimetry

Main Subjects