Kinetics and thermoluminescent parameters of CaSO<sub>4</sub>: Dy Ribbon, TLD-900, at low dose levels

Furetta, C.; Gennai, P.

doi:10.1080/00337578108225460

Cited by 15 publications

(3 citation statements)

References 14 publications

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“…The values are greatly different in magnitude from those obtained by the initial rise method of Furetta and Gennai, 2 Drazic and Trontelj, 3 Srivastava and Supe, 9 Nambi and Bapat, 10 and Huzimura and Atarashi. The values are greatly different in magnitude from those obtained by the initial rise method of Furetta and Gennai, 2 Drazic and Trontelj, 3 Srivastava and Supe, 9 Nambi and Bapat, 10 and Huzimura and Atarashi.…”

Section: Discussioncontrasting

confidence: 63%

Multilevel based analysis of the thermoluminescence of CaSO4:RE (RE=Tm, Dy, Tb, and Sm)

Shinsho

Suzuki

Harada

et al. 2006

Journal of Applied Physics

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Vacuum ultraviolet spectroscopic properties of rare earth ( RE = Ce , Tb , Eu , Tm , Sm ) -doped hexagonal K Ca Gd ( P O 4 ) 2 phosphateThe thermoluminescence activation energy and frequency factor of the main glow of Ca S O 4 : Tm phosphor determined by heating rate method including very slow rates of heating Multitrapping levels feature of thermoluminescent ͑TL͒ phosphors of CaSO 4 :RE ͑RE= Dy, Tb, and Sm͒ were analyzed using a variable heating rate method ͑including extremely slow heating rates of 0.001°C s −1 ͒, the postannealing method, and the analysis of TL decay curves using x-ray induced luminescence ͑XIL͒ spectroscopy after x-ray excitation was cut off at temperatures between 100 and 240°C. All the data confirmed the multilevel feature of the TL levels. The ranges of activation energies E of these components in the main glow were determined to be ͑a͒ 1.64-2.03 eV for CaSO 4 : Dy, ͑b͒ 1.66-2.01 eV for CaSO 4 : Tb, and ͑c͒ 1.66-2.00 eV for CaSO 4 : Sm. The frequency factor s was determined to be 10 19 s −1 for all components of the phosphors. The previously reported TL properties of the CaSO 4 : Tm phosphor were reinvestigated using the XIL decay analysis. Assuming that the most populated level is located at the center of the main glow, the four phosphors have similar E values of ϳ1.8 eV. The present results imply that the multicomponent TL properties of rare-earth-doped CaSO 4 phosphors are characterized by a lattice of CaSO 4 involving defects introduced around RE 3+ ions, and the glow curve properties are essentially not dependent on the rare-earth species introduced.

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Section: Discussioncontrasting

confidence: 63%

Multilevel based analysis of the thermoluminescence of CaSO4:RE (RE=Tm, Dy, Tb, and Sm)

Shinsho

Suzuki

Harada

et al. 2006

Journal of Applied Physics

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“…1 and seems to follow a 2nd order kinetics. In fact, the kinetics of Caso is reported to follow an intermediate order [5,6]. The best fit 4 to the experimental data is represented by a 4th degree polynomial using the Tchebychev approximation.…”

Section: Experimental Methods and Resultsmentioning

confidence: 99%

“…tanh[a !/T 1 ) 2nd order kinetics (6) time the R from equations [5] and [6] has been plotted against elapsed Ct-ti) in Fig. 1 for some values of the aean trap lifetimes using following physical parameters: (+~> 1 = 90, (+ 0 ) 2 = 100, a 1 = 90, a 2 = 100 (TL counts mGy-1 ), B = 3 x 10-(mGy.day-1 ), t = 30 days and = t 2 * = 400 days.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Determination of Dose and Elapsed Time in Accident Dosimetry Using Thermoluminescent Materials

Furetta¹,

Tuyn²,

Louis³

et al. 1986

Radiation Protection Dosimetry

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Information about the time which has elapsed since an external radiation exposure is useful in determining the time of occurrence of an abnormal exposure in personal and accident dosimetry. This information can be obtained from certain irradiated thermoluminescent dosemeters. A computational method based on decay rates of thermoluminescence glow peaks has been used to estimate a range of suitable values of trap lifetimes of low temperature glow peaks. This provides a basis for the selection of an appropriate thermoluminescent material to assess not only the absorbed dose from a radiation exposure but also the elapsed time. The results of experimental studies have been used to obtain additional information on decay rates as a function of energy, temperature, and absorbed dose.To be presented at 8th International Conference on Solid State Dosimetry

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Preparation and properties of thermoluminescent materials

Azorı́n

Furetta

Scacco

1993

Phys. Stat. Sol. (a)

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107

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Kinetics and thermoluminescent parameters of CaSO₄: Dy Ribbon, TLD-900, at low dose levels

Cited by 15 publications

References 14 publications

Multilevel based analysis of the thermoluminescence of CaSO4:RE (RE=Tm, Dy, Tb, and Sm)

Multilevel based analysis of the thermoluminescence of CaSO4:RE (RE=Tm, Dy, Tb, and Sm)

Simultaneous Determination of Dose and Elapsed Time in Accident Dosimetry Using Thermoluminescent Materials

Preparation and properties of thermoluminescent materials

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Kinetics and thermoluminescent parameters of CaSO4: Dy Ribbon, TLD-900, at low dose levels

Cited by 15 publications

References 14 publications

Multilevel based analysis of the thermoluminescence of CaSO4:RE (RE=Tm, Dy, Tb, and Sm)

Multilevel based analysis of the thermoluminescence of CaSO4:RE (RE=Tm, Dy, Tb, and Sm)

Simultaneous Determination of Dose and Elapsed Time in Accident Dosimetry Using Thermoluminescent Materials

Preparation and properties of thermoluminescent materials

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Kinetics and thermoluminescent parameters of CaSO₄: Dy Ribbon, TLD-900, at low dose levels