A newly developed OSL dosimeter based on beryllium oxide: BeO:Na,Dy,Er

A systematic study on luminescence characterization of lanthanide-doped BeO ceramic dosimeters

“…On the other hand, studies on the TL glow curve of BeO Thermalox 995 chip showed three main TL peaks at 75, 200, and 340 °C (depending on the heating rates during TL readouts) [23], although some deep traps were also found after 340 °C [51]. In this work, the observed five peaks are suggested to be consistent with the TL glow curve shapes obtained in the undoped and doped BeO ceramic materials specified in our previous studies [12,13,31].…”

“…All raw dopant materials (Na + , Li + , K + , and Ln 3+ (Eu 3+ , Ce 3+ , Nd 3+ , Yb 3+ , Er 3+ , Gd 3+ , Tb 3+ , Tm 3+ , Sm 3+ , Sr 3+ , Pr 3+ , and Dy 3+ )) used were only nitrate based. The coprecipitation method was presented in detail previously in our studies [12,20,31,38], and modified to better control the Ln 3+ -doped BeO synthesis process in this study. The actual Ln 3+ contents in the sintered pellets were not verified.…”

“…In the literature, although there are a lot of materials with well-determined OSL properties (Al 2 O 3 , BeO, MgO, etc. ), there exist a limited number of commercialized OSL materials e.g., Al 2 O 3 :C from Landauer Inc. and Thermalox 995 BeO from Materion Inc. For this reason, the researchers have suggested fundamental mechanisms governing the luminescence properties in various host oxide lattices and developed new TL or OSL materials [8][9][10][11][12][13][14][15][16][17][18].…”

“…Therefore, it attracts researchers to produce new BeO-based materials with appropriate dopants to improve the luminescence properties of BeO ceramic material and achieve controllable luminescence. Due to the increasing demand for passive radiation detectors in radiation dosimetry, our research group has been studying synthesized and doped BeO ceramics as probable OSL dosimeters over the last decade [11][12][13]20,31,32].…”

Optically Stimulated Luminescence Phosphors: Principles, Applications, and Prospects

“…The energy levels of defects in the bandgap close to the CB minimum and VB maximum are regarded as electron and hole traps. The big and small [ 191] Tb 3+ , Hf 4+ 544 442 - [ 192] LiCaPO 4 Ce 3+ 369 Blue LED 0.6, 0.9 [ 193] LiNbO 3 Pr 3+ 620 980 - [ 194] Ca 4 Ti 3 O 10 Pr 3+ , Y 3+ 612 980 0.9-0.98 [ 195] LiTaO 3 Bi 3+ 430 808/980 0.55-1.16 [ 196] ZrO 2 -480 808/980 - [ 197] SrMoO 4 --470 0.9-1.95 [ 198] BeO Na + , Tb 3+ , Gd 3+ -470 - [ 199] Na + , Dy 3+ , Er 3+ 250 470 - [ 200] LiMgPO Tm 3+ 460 energy differences between the defect energy level and CB/VB differ the deep and shallow traps. [205,206] Though the incorporation of an activator can affect the intrinsic traps or even cause new traps, an effective way is to properly codope with a different ion to introduce the traps intentionally.…”