Thermoluminescence and optical studies on X-irradiated terbium-doped potassium bromide crystals

Bangaru, S.; Muralidharan, G.; Brahmanandhan, G. M.

doi:10.1016/j.jlumin.2009.11.005

Cited by 29 publications

(12 citation statements)

References 29 publications

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“…It can be used in many cases for integrating TL signals relevant to TL dosimetry/TL dating. In our recent paper, the analysis of the major TL peaks of KBr: Tb has been reported by us [35]. The values of the trapping parameters (activation energy 'E', frequency factor 'S' and order of kinetics 'I') are also presented in Table 1.…”

Section: Photoluminescencementioning

confidence: 97%

“…Consequently, the KBr: CeTb crystals have an enhanced band emission compared with the KBr:Tb crystals. Besides the brightness, one important factor in selecting phosphor in color co-ordinates as was reported [21,35]. Ce 3+ known to be a sensitizer for Tb 3+ in many hosts [9][10][11][12][13][14]31].…”

Section: Photoluminescencementioning

confidence: 99%

“…The excitation spectrum of KBr:Tb for 390 nm exhibits two bands at 355 nm,268 nm and a prominent shoulder around 240 nm[35] as shown in [Fig. 5curve2].…”

mentioning

confidence: 99%

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Luminescence Properties and Optical Absorption of X ray-Irradiated KBr: Ce3+, Tb3+ Crystals

Bangaru¹,

Saradha²,

Muralidharan

2015

J Fluoresc

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This paper reports that KBr doubly doped with Tb(3+) and Ce(3+) were prepared by Bridgman-Stockbarger method and characterized by Optical absorption, Photoluminescence (PL), Thermoluminescence (TL), Photo stimulated emission (PSL) and TL emission, after X-ray irradiation have been observed. The optical absorption measurement indicates that F and Z3 centers are formed in the crystal during X-ray irradiation process. It was attempted to incorporate a broad band of Ce(3+) sensitizer into the narrow band emission of Tb(3+) in the KBr host without reduction of emission intensity. Co-doping of Ce(3+) ions in KBr:Tb(3+) crystal showed a broad band emission due to the d-f transition of Ce(3+) and a reduction in the intensity of emission peaks due to (5)days → (7)F6 transition of Tb(3+) when they were excited at 250 nm. These results supported that an effective energy transfer occurs from Ce(3+) to Tb(3+) in the KBr host. Co-doping Ce(3+) ions greatly intensified the excitation peak at 260 nm for the emission at 390 nm of Tb(3+) which means that more lattice defects, involved in the energy absorption and transfer to Tb(3+), are formed by the Ce(3+) co-doping. The integrated light intensity is two orders of magnitude higher as compared to the undoped samples for similar doses of irradiation and heating rate. Thermoluminescence process has been identified due to thermal mobilization of F-electrons and this causes peaks at 371 K and at 427 K, 457 K in KBr: Ce(3+), Tb(3+) crystals. The defects generated by irradiation were monitored by optical absorption and trap parameters for the TL process were calculated and presented.

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Section: Photoluminescencementioning

confidence: 97%

Section: Photoluminescencementioning

confidence: 99%

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Luminescence Properties and Optical Absorption of X ray-Irradiated KBr: Ce3+, Tb3+ Crystals

Bangaru¹,

Saradha²,

Muralidharan

2015

J Fluoresc

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“…Recently, Kher et al and Puppalwar et al prepared phosphors for measurement of radiation dose based on ML and LL techniques, respectively, by using the rare earth materials as the dopant. Bangaru and co‐workers also reported enhanced luminescent properties and TL studies in alkali halides by doping rare earth materials. Many alkali halide‐based materials like LiF exhibit important dosimetric properties.…”

Section: Introductionmentioning

confidence: 96%

Lyoluminescence, thermoluminescence and mechanoluminescence studies in γ‐ray irradiated Dy³⁺ activated potassium chloride phosphor for accidental radiation dosimetry

Bhujbal¹,

Dhoble

2011

Luminescence

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The lyoluminescence (LL), thermoluminescence (TL) and mechanoluminescence (ML) of γ-ray-irradiated coloured powder of KCl:Dy (0.05-0.5 mol%) phosphors are reported in this paper. To understand the mechanism of LL and ML, the LL and ML spectra are compared with TL studies. The variation of intensity of respective luminescence with different γ-ray doses and with different concentrations of Dy3+ ion doped in KCl is found to be similar in nature. The intensities differ from each other, but their nature is found to be similar with γ-ray exposures. The ML glow peak intensity is linear up to high 1 kGy exposure as compared to LL (up to 0.5 kGy) and TL (up to 0.75 kGy) techniques. Therefore, according to our results, the recommendation is that KCl:Dy (0.1 mol%) phosphor prepared by wet chemical technique is useful for high-dose measurements using the ML technique for accidental radiation dosimetry.

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“…Recently, Bangaru and co‐workers also reported enhanced luminescent properties and TL studies in alkali halides by doping rare earth materials. Bhujbal et al .…”

Section: Introductionmentioning

confidence: 99%

KCl:Dy phosphor for thermoluminescence dosimetry of ionizing radiation

Bhujbal¹,

Dhoble

2012

Luminescence

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The thermoluminescence (TL) characterizations of γ-irradiated KCl:Dy phosphor for radiation dosimetry are reported. All phosphors were synthesized via a wet chemical route. Minimum fading of TL intensity is recorded in the prepared material. TL in samples containing different concentrations of Dy impurity was studied at different γ-irradiation doses. Peak TL intensities varied sublinearly with γ-ray dose in all samples, but were linear between 0.08 to 0.75 kGy for the KCl:Dy (0.1 mol%) sample. This material may be useful for dosimetry within this range of γ-ray dose. TL peak height was found to be dependant on the concentration (0.05-0.5 mol%) of added Dy in the host.

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Thermoluminescence and optical studies on X-irradiated terbium-doped potassium bromide crystals

Cited by 29 publications

References 29 publications

Luminescence Properties and Optical Absorption of X ray-Irradiated KBr: Ce3+, Tb3+ Crystals

Luminescence Properties and Optical Absorption of X ray-Irradiated KBr: Ce3+, Tb3+ Crystals

Lyoluminescence, thermoluminescence and mechanoluminescence studies in γ‐ray irradiated Dy³⁺ activated potassium chloride phosphor for accidental radiation dosimetry

KCl:Dy phosphor for thermoluminescence dosimetry of ionizing radiation

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Thermoluminescence and optical studies on X-irradiated terbium-doped potassium bromide crystals

Cited by 29 publications

References 29 publications

Luminescence Properties and Optical Absorption of X ray-Irradiated KBr: Ce3+, Tb3+ Crystals

Luminescence Properties and Optical Absorption of X ray-Irradiated KBr: Ce3+, Tb3+ Crystals

Lyoluminescence, thermoluminescence and mechanoluminescence studies in γ‐ray irradiated Dy3+ activated potassium chloride phosphor for accidental radiation dosimetry

KCl:Dy phosphor for thermoluminescence dosimetry of ionizing radiation

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Lyoluminescence, thermoluminescence and mechanoluminescence studies in γ‐ray irradiated Dy³⁺ activated potassium chloride phosphor for accidental radiation dosimetry