Dosimetric characterization of highly sensitive OSL phosphor: LiCaAlF6:Eu,Y

Radiation dose measurements in a dental orthopantogram unit using indigenously developed optically stimulated luminescence dosimeters

“…= 14.05) is about 20 times higher than that of Al 2 O 3 :C (Z eff. = 11.28) . Figure (a−c) presents the dose−response calibration curves of OSLDs at three X‐ray energies (60, 70 and 81 kV).…”

“…Three different OSL phosphors, developed by Bhabha Atomic Research Centre (BARC), namely aluminium oxide doped with carbon (Al 2 O 3 :C), lithium magnesium phosphate doped with terbium and boron (LiMgPO 4 :Tb,B) and lithium calcium aluminium fluoride doped with europium and yttrium (LiCaAlF 6 :Eu,Y) were used in the study. Methods of preparations of these OSL phosphors are available elsewhere . These OSL phosphors were reported to be highly sensitive with minimum detectable dose of the order of a few 10s of μGy.…”

Relative energy response of indigenously developed optically stimulated luminescence dosimeters Al2O3:C, LiMgPO4:B and LiCaAlF6:Eu,Y in therapeutic photon and electron beams

“…The fading characteristics reported for these OSL phosphors were: (i) 5% in the first 5-15 min following irradiation and after that fading was negligible for Al 2 O 3 :C [11,12] ; (ii) 15% in first 10 days following irradiation, after that the fading was negligible for LiMgPO 4 :B [13] ; and (iii) 7% in about 9 days following irradiation and after that fading was negligible for LiCaAlF 6 :Eu,Y. [10] Considering the fading characteristics of these OSL phosphors, we followed a fixed protocol of reading out the irradiated discs after 10 days. In this study, we prepared circular discs (5 mm diameter and 0.4 mm thickness) of these three OSL phosphors.…”

“…Synthesis techniques for these OSL phosphors have been published previously. [6][7][8][9][10] These three OSL phosphors prepared at BARC were reported to be highly sensitive and capable of detecting very low doses in the order of microGray (μGy). The fading characteristics reported for these OSL phosphors were: (i) 5% in the first 5-15 min following irradiation and after that fading was negligible for Al 2 O 3 :C [11,12] ; (ii) 15% in first 10 days following irradiation, after that the fading was negligible for LiMgPO 4 :B [13] ; and (iii) 7% in about 9 days following irradiation and after that fading was negligible for LiCaAlF 6 :Eu,Y.…”

Development of wavelength-resolved 3D-inegrated TL and OSL reader system

“…In this technique, the metastable trapped charges are optically released and the subsequent recombination with charges of opposite polarity emits the OSL signal, which contains the information of photoionization cross-section of the active trap defects in the material. Apart from this, the fast and multiple readout features coupled with choice of optical erasing has made researchers to synthesize the new OSL sensitive materials [3,[11][12][13] for application in passive radiation dosimetry. To accomplish the TL/OSL research studies, a variety of commercial systems are available worldwide.…”