TL/OSL studies of Li2B4O7:Cu dosimetric phosphors

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dc.citation.epage32en_US
dc.citation.spage24en_US
dc.citation.volumeNumber58en_US
dc.contributor.authorAydin, T.en_US
dc.contributor.authorDemirtaş H.en_US
dc.contributor.authorAydin, S.en_US
dc.date.accessioned2016-02-08T09:35:52Z
dc.date.available2016-02-08T09:35:52Z
dc.date.issued2013en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.description.abstractDosimetric phosphors of Cu-doped lithium tetraborate (Li2B 4O7:Cu) were produced using a sintering technique in a laboratory environment and characterized using Scanning Electron Microscopy (SEM) and X-ray Diffractometry (XRD). The thermoluminescence (TL) and optically stimulated luminescence (OSL) properties of powdered (Li2B 4O7) phosphor doped with copper at different concentrations (0.020-0.025 wt %) were studied. The Cu-doped Li 2B4O7 phosphor material has two dominant TL glow peaks, and the maximum TL responses of the peaks are at 115 C and 243 C in the range of 0 C-310 C. The TL response of the Cu-doped lithium tetraborate is approximately 900 times more sensitive than undoped lithium tetraborate. The TL and OSL signal intensities increase as the beta radiation doses increase up to approximately 150.00 Gy and 76.50 Gy, respectively. The OSL dose-response curve is linear up to a dose range of 12.00 Gy for Cu-doped Li2B 4O7 dosimetric phosphors. The time-dependent fading behavior of the Cu-doped lithium tetraborate was found to be quite stable over long time durations. In addition, the repeatability of the OSL dose measurements were determined to be 2/3 lower compared to the TL measurements. The reproducibility of the OSL measurements was approximately 5%. Based on the TL and OSL results, the prepared phosphors can be used to measure beta doses ranging from 10 μGy to 150.00 Gy and 76.50 Gy, respectively, by using the TL and OSL techniques, with confidence limits of approximately 7% and 3-4%, respectively. © 2013 Elsevier Ltd. All rights reserved.en_US
dc.description.provenanceMade available in DSpace on 2016-02-08T09:35:52Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 70227 bytes, checksum: 26e812c6f5156f83f0e77b261a471b5a (MD5) Previous issue date: 2013en
dc.identifier.doi10.1016/j.radmeas.2013.07.010en_US
dc.identifier.issn13504487
dc.identifier.urihttp://hdl.handle.net/11693/20816
dc.language.isoEnglishen_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.radmeas.2013.07.010en_US
dc.source.titleRadiation Measurementsen_US
dc.subject(Li 2B4O7:Cu)en_US
dc.subjectOptically stimulated luminescence (OSL)en_US
dc.subjectScanning electron microscope (SEM)en_US
dc.subjectThermoluminescence (TL)en_US
dc.subjectDose-response curvesen_US
dc.subjectLaboratory environmenten_US
dc.subjectLithium tetraborateen_US
dc.subjectOptically stimulated luminescenceen_US
dc.subjectPhosphor materialsen_US
dc.subjectReproducibilitiesen_US
dc.subjectSignal intensitiesen_US
dc.subjectCopperen_US
dc.subjectDosimetryen_US
dc.subjectLight emissionen_US
dc.subjectLithiumen_US
dc.subjectPhosphorsen_US
dc.subjectScanning electron microscopyen_US
dc.subjectSinteringen_US
dc.subjectX ray diffraction analysisen_US
dc.subjectThermoluminescenceen_US
dc.titleTL/OSL studies of Li2B4O7:Cu dosimetric phosphorsen_US
dc.typeArticleen_US

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