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There are many methods for the detection of irradiated foods. Among these methods, the only physical method that gives reliable results even many years after irradiation is Thermoluminescence (TL) method. In this article, results of the experiments conducted within the scope of an international comparison study to determine whether the samples of cinnamon, curry, green lentils, dried mushrooms, sunflower seeds, oregano and green tea were exposed to any irradiation process using thermoluminescence technique are presented. According to the TS EN 1788:2007, the natural (TL1) and 1 kGy beta irradiated (TL2) TL glow curves of the silicate minerals separated from the above - mentioned food samples were obtained. The peak temperatures at the maximum values of these curves and the ratios of the areas under the curves (TL1 / TL2) were examined. In the comparison study results reports, it was stated that all samples were detected as "irradiated" or "non-irradiated" with 100% success. [ABSTRACT FROM AUTHOR]

The aim of this study is to determine the thermoluminescence (TL) kinetic parameters of pure yttrium borate (YBO3) phosphor. The YBO3 phosphor synthesized by combustion reaction was converted into pellet form and TL measurements were made. The samples exposed to the beta dose in the range of 0.1-5 Gy were heated from room temperature to 500°C at a constant rate of 2°C/s. TL glow curves of the sample were obtained for both different doses and various heating rates. The current peak shape (PS), various heating rates (VHR) and glow curve deconvolution (GCD) methods were used to calculate the trap parameters of the TL dosimetric peak centered at 210°C by analyzing the obtained TL signals. When Chen's PS method was applied to TL peak displayed in different doses, the average activation energy (E) and frequency factor (s) were found to be 0.847 eV and in the order of 107 s-1. The E and s values obtained using two different VHR methods were 1.050 ± 0.05 eV and in the order of 109 ± 10³ s-1 for one and 0.890 eV and in the order of 108 s-1 for the other. The GCD method was applied using the 'tgcd' package of the R-studio program. As a result of applying deconvolution to the peak maximum obtained in beta doses of 0.5 and 5 Gy, two peaks matching the 1st order kinetics were obtained. The E values of the deconvolved peaks (peak 1) were found as 0.889 and 0.868 eV whereas the s values were in the order of 108 s-1. [ABSTRACT FROM AUTHOR]

The thermoluminescence (TL) properties of cerium rare earth ion doped strontium yttrium borate (Sr3Y2(BO3)4: Ce) phosphor irradiated with UV radiation were investigated in the present study. Sr3Y2(BO3)4: Ce phosphor was synthetized by the solid-state reaction method and characterized by using X-ray diffraction (XRD) and thermoluminescence techniques. Thermoluminescence measurements were carried out for the phosphor irradiated with UV radiation having 254, 302 and 365 nm wavelength. The dose response and fading properties were examined for the Sr3Y2(BO3)4: Ce phosphor irradiated with UV radiation having 254 nm wavelength. As far as we know there is no earlier work on thermoluminescence properties of these phosphors in literature. [ABSTRACT FROM AUTHOR]

Non-radiative transitions are one of the important problems for the thermoluminescence event. One of the models offered to explain non-radiative transition is Schön-Klasens. In this paper, the Schön-Klasens model was discussed both from theoretical and numerical viewpoints. The brief information about mathematical principals of the model was given and differential equations that controlled charge carrier traffic were derived. Some numerical solutions of the model were performed by using variable Ee and Eh parameters. This study has concluded that the glow curve is affected by both charge carriers according to relationship between Ee and Eh parameters. [ABSTRACT FROM AUTHOR]

The quartz samples collected from quartz sand deposits from Yeşilovacık Mersin region were studied Thermoluminescence (TL) from room temperature to 400°C after irradiated by X-ray source. Thermoluminescence trap parameters were calculated via Various Heating Rate (VHR) method. Heating rates were selected as 0.5°C/s, 1°C/s, 2°C/s, 5°C/s, 10°C/s. The peak maximum temperature shift values from TL glow curve at 90°C, 210°C and 320°C were monitored by VHR method. The temperature shift along to heating rates were used to calculate the trap parameters as Activation Energy (E) and Frequency Factor (s). The activation and frequency factor values were obtained as 0.84eV, 2.84x1010 s-1, 1.13eV, 2.34x1013 s-1 and 1.78eV, 1.59x1018s-1 at selected peaks. [ABSTRACT FROM AUTHOR]

It is a well-known fact that language and culture is related. That relationship between language and culture in semantic level can be clearly seen in the vocabulary of that particular language. The lexicon of a language reflects traditions, beliefs and the perspectives of the society that use this specific language. Thus changes occur in a society directly effects the language and its lexicon. In the light of that, there has been communication both directly and indirectly between Persian and Turkish for centuries. As a consequence of the cultural interaction between Turkish and Persian languages, these two languages affected interculturally. It can be traced back to pre-Islamic period. One of the most striking field whose effects can be felt is language. The relationship between Turkish and Persian is not limited to lexical borrowing and also syntactic borrowings can be observed. In this stud points that are examined are: how these relations can be used in teaching Turkish as a second language in Persia and how shared knowledge make learning Turkish proverbs and idioms easier. Persians student's usage of proverbs and idioms in different level of Turkish language course are also revealed. [ABSTRACT FROM AUTHOR]