Energy transfer in Ba1−xSrxFBr:Eu storage phosphors as a function of Sr and Eu concentration

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

“…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. 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.…”

Structure and neutron imaging characteristics of lithium borate–barium chloride glass-ceramics

“…The samples containing orthorhombic BaCl 2 with a minor phase of BaFCl display similar PL to that of BaFCl:Eu 2+ reported in the literature, however the PSL spectrum is again dominated by that of orthorhombic BaCl 2 . This PSL quenching in nanocrystalline BaFCl:Eu 2+ could be due to a crystallite size-effect which has been observed with nanocrystalline BaBr 2 :Eu 2+ and BaCl 2 :Eu 2+ [12], concentration quenching or possible uptake of Li + ions; both of the latter effects have been known to reduce PSL in the related compound BaFBr:Eu 2+ [13,14].…”

Temperature dependence of the photostimulated luminescence in KCl:Eu2+

“…This suggests that there are certain types of charge-storage centers are not stable at temperatures above 200 K that contribute to the fast fading. It has been reported that V k centers in BaFBr:Eu 2+ are stable at low temperatures but migrate around at temperatures above 200 K [7, 8, 11]. Therefore, the hole-storage V k centers may be primarily responsible for the fast fading due to high mobility at relatively high temperatures (above 200 K).…”