Radiation hardness of CsBr:Eu2+

Photo-induced degradation and thermal decomposition in ZnSnF6·6H2O:Mn4+ red-emitting phosphor

“…Some factors were considered to interpret the photo-induced degradation, such as crystalline defects [34][35][36][37][38][39][40] and migration/agglomeration of activator ions [41,42].…”

Radiation hardness of the storage phosphor europium doped potassium chloride for radiation therapy dosimetry

“…15 Jursinic suggested that Al 2 O 3 :C dosimeters could be used for accurate radiation therapy dosimetry if the sensitivity and extent of supralinearity were established for each dosimeter in use. 15 Recent research [16][17][18][19] into an emerging diagnostic CR material, CsBr:Eu 2þ , however, has found a rapid loss of signal with cumulated dose, [20][21][22] probably resulting from radiation-mediated agglomeration of activator ions (Eu 2þ ) in this material, which leads to luminescence quenching. 23 It has been reported that CsBr:Eu 2þ maintains only 10% of its initial sensitivity after 100 Gy.…”

“…23 It has been reported that CsBr:Eu 2þ maintains only 10% of its initial sensitivity after 100 Gy. 20 While co-doping this material with lithium (Li) has been explored as a way to slow the agglomeration of activator ions, the sensitivity loss remains significant (50% after 25 Gy) by radiation therapy standards. 21,22 The present work offers the first systematic investigation into the radiation hardness of KCl:Eu 2þ .…”

Optical Storage Phosphors and Materials for Ionizing Radiation

“…In particular, the photostimulated luminescence deteriorates rapidly upon exposure to high X-ray dose and this deterioration is correlated with a reduction of the photoexcited Eu 2+ fluorescence that has been attributed to an agglomeration of Eu 2+ leading to luminescence quenching. (Zimmermann et al, 2005). This conclusion has been reached since no increase in Eu 3+ luminescence is observed.…”