Mobile phone screen protector glass: A TL investigation of the intrinsic background signal
Résumé
Screen protector glasses are often used to protect the display screen surface
of mobile phones against physical damage. Their dosimetric properties were
recently studied by thermoluminescence with the aim of using these items
as potential emergency dosimeters in the event of a radiological accident.
They are sensitive to ionizing radiation and they could be easily removed and
replaced without destroying the phone in case of a dose assessment. However,
an intrinsic background signal that partially overlaps with the radiation-induced
TL signal is observed. The reconstructed dose could be overestimated if
not properly taken into account. The homogeneity of this confounding
signal on the surface of several screen protectors was estimated and a
chemical treatment with hydrofluoric acid (HF 40%) was tested to minimize
its contribution. For most of the samples studied, the intrinsic background
signal remained a serious issue for dose reconstruction. Additionally, the TL
signals were measured in the red detector range using two different models
of red-sensitive photomultiplier tubes. The homogeneity of the intrinsic
background signal on the surface of screen protectors was examined and
the results of the reduction of this signal by the chemical HF treatment
were discussed.
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Licence : CC BY - Paternité
Licence : CC BY - Paternité
