UVC dosimetry properties of Mn and Ce doped KCl thermoluminescent phosphor produced by co-precipitation method

Talebi, M.; Zahedifar, M.; Sadeghi, Ehsan

doi:10.1016/j.nimb.2019.08.008

Cited by 7 publications

(5 citation statements)

References 25 publications

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“…The results of previous studies showed a linear response of decreasing energy gaps to γ-rays irradiation on TeO 2 thin films observed in the dose range of 0 to 37 Gy, which resulted in an energy gap in the range of 3.75 to 345 eV [ 48 ]. The linear response decreased the energy gap to 4.16 and 4.34 eV for KCl-Mn and KCl-Ce phosphorus polymer materials irradiated with γ-rays at doses of 0.08 to 0.75 kGy [ 49 ].…”

Section: Resultsmentioning

confidence: 99%

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Polymer Film Blend of Polyvinyl Alcohol, Trichloroethylene and Cresol Red for Gamma Radiation Dosimetry

Doyan

Susilawati

Prayogi³

et al. 2021

Polymers

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This study investigated the polymer film composite of polyvinyl alcohol (PVA), trichlorethylene (TCE) and cresol red (CR) dye irradiated with gamma (γ) rays for potential application as radiation dosimetry. The film was prepared via the solvent-casting method with varying concentrations of TCE. Film samples were exposed to radiation from a γ-rays radiation source of 60Cobalt isotope. Color changes before and after γ-rays irradiation were observed, and the optical properties of the polymer films were investigated by spectrophotometry. Results show that increasing the radiation dose physically changed the color of the polymer film, from purple (pH > 8.8) without radiation (0 kGy) to yellow (almost transparent) (2.8 < pH < 7.2) at the highest dose (12 kGy). The concentration of acid formed due to irradiation increased with the increase in irradiation doses and at higher TCE content. The critical doses of PVA-TCE composites decreased linearly with the increase of TCE composition, facilitating an easy calibration process. The dose response at 438 nm increased exponentially with increasing radiation dose, but showed an opposite trend at the 575 nm band. An increase in the TCA concentration indicated a decrease in the absorption edge and an increase in activation energy, but both decreased for all TCE concentrations at higher doses. The energy gap for the direct and the indirect transitions decreased with increasing TCE concentration and γ-rays radiation dose. The results of this study demonstrated the potential application of PVA-TCE-CR polymer film as γ-rays irradiation dosimetry in a useful dose range of 0–12 kGy.

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Section: Resultsmentioning

confidence: 99%

“…In this present work, the energy gap for both types of transitions (direct and indirect) showed a linear decreasing response to radiation dose. Linearity indicated that the material has stable optical properties which can be used as a promising dosimetry [ 48 , 49 ].…”

Section: Resultsmentioning

confidence: 99%

Polymer Film Blend of Polyvinyl Alcohol, Trichloroethylene and Cresol Red for Gamma Radiation Dosimetry

Doyan

Susilawati

Prayogi³

et al. 2021

Polymers

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“…The peak shape coefficients ðC α x , D α x Þ are needed to evaluate E according to Equation (21). From Equation ( 22) and ( 23), the dependence of ðC α x , D α x Þ on μ 0 gx is expressed through the fitting constants C 1 αx , C 2 αx , D 1 αx , D 2 αx , which are obtained in the linear regression method.…”

Section: Peak Shape Coefficients At Different Fractional Intensitiesmentioning

confidence: 99%

“…This work, [18] due to the accuracy it yields in estimating activation energy, has drawn considerable attention among researchers. [19][20][21] In a subsequent work, Kitis et al [22] also attempted an alternative approach to derive a set of peak shape formulae in terms of integral symmetry factor in the mixed-order kinetics (MOK) model.…”

Section: Introductionmentioning

confidence: 99%

Reappraisal of Peak Shape Method Based on Average Geometrical Symmetry Factor and Its Application to Thermoluminescence Glow Curves

Kundu¹,

Chakrabarty²,

Bhattacharyya³

et al. 2021

Physica Status Solidi (b)

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A new set of peak shape formulas at different fractional intensities is proposed to extract the activation energy from a thermoluminescence (TL) glow curve. The peak shape coefficients are formulated on the basis of the average geometrical symmetry factor which is estimated considering its dependence on the relevant TL parameters. An empirical dependence of the geometrical symmetry factor on order of kinetics and other parameters is also reported. The present method is used on TL peaks generated in general order kinetics (GOK) approximation and in one trap one recombination center (OTOR) model using a wide range of TL parameters. During the course of TL peak simulation, an alternative analytical approach to evaluate the “temperature integral” is developed. The present method seems to be useful to evaluate the activation energy for all peaks except for the heavy retrapping cases when the initial trap saturation is considerably high. A probable reason behind this limitation is also explored by examining the correspondence between the temperature average of order of kinetics and the retrapping‐to‐recombination probability. Finally, the new peak shape formulas are tried on isolated single peaks deconvoluted from composite experimental TL curves reported in the literature and the results are quite satisfactory.

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“…Talebi et al. [ 15 ] studied the UVC dosimetry properties of Mn and Ce doped KCl thermoluminescent phosphor, indicating that the material is a good candidate for UVC dosimetry.…”

Section: Introductionmentioning

confidence: 99%

Luminescent and Mechanical Properties of Cerium Doped Potassium Chloride Single Crystal

Zhang

et al. 2020

Crystal Research and Technology

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Large size cerium (Ce3+)‐doped potassium chloride single crystal is grown by the resistance heating Czochralski method and characterized structurally, mechanically, and optically by carrying out X‐ray diffraction (XRD), micro‐hardness, photoluminescence (PL), PL excitation (PLE), thermo‐luminescence (TL), and decay time measurements. XRD measurements reveal the incorporation of Ce atoms into the KCl host lattice. Microhardness measurements indicate an improvement in the hardness due to Ce3+‐doping and a decrease of hardness with increasing temperature. Two intense PL emission peaks are observed at wavelengths 343 and 367 nm, attributed, respectively, to the 5d→2F5/2 and 5d→2F7/2 transitions of Ce3+. Energy level scheme for the Ce3+ ion in the KCl crystal is proposed through PL and PLE analyses. The observed TL glow curve of KCl:Ce3+ shows a sharp peak located at about 244 °C. XRD, PL, and TL studies confirm the trivalent state of Ce3+ ion in the KCl host lattice. The luminescence decay time of KCl:Ce3+ crystal is found to be 35.14 ± 0.17 ns. The present study indicates that the KCl:Ce3+ crystal grown exhibiting suitable PL and TL emissions is expected to be a potential material for radiation dosimetry and scintillation applications.

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UVC dosimetry properties of Mn and Ce doped KCl thermoluminescent phosphor produced by co-precipitation method

Cited by 7 publications

References 25 publications

Polymer Film Blend of Polyvinyl Alcohol, Trichloroethylene and Cresol Red for Gamma Radiation Dosimetry

Polymer Film Blend of Polyvinyl Alcohol, Trichloroethylene and Cresol Red for Gamma Radiation Dosimetry

Reappraisal of Peak Shape Method Based on Average Geometrical Symmetry Factor and Its Application to Thermoluminescence Glow Curves

Luminescent and Mechanical Properties of Cerium Doped Potassium Chloride Single Crystal

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