Electron paramagnetic resonance study of gamma (γ)-irradiated methyl 4-methyl benzoate (C9H10O2)

Karataş, Özgül; Aras, Erdal; Karadag, A. Halide; Işlek, Yasemin

doi:10.1080/10420150.2016.1240175

Cited by 5 publications

(2 citation statements)

References 32 publications

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“…Electron Spin Resonance (ESR) (or alternatively, Electron Paramagnetic Resonance, EPR) is a powerful and sensitive method for identification of paramagnetic centers and free radicals in solids and liquids (Karatas, 2012;Jonas, 1997). It provides a detailed description for different materials and widely used for a lot of area such as medicine (Sarcan et al, 2020); archaeology (Duval et al, 2018); geology (Lopes et al, 2020); industrial irradiations (Karatas, et al, 2016); dosimetry (Toyoda et al, 2020); dose reconstruction for several radiation events and accidents (Skvortsov et al, 2000) etc.…”

Section: Introductionmentioning

confidence: 99%

Determination of Optimal Modulation Amplitude for Electron Spin Resonance (ESR) Dating and Dosimetry Studies of Tooth Enamel

Karataş¹

2020

European Journal of Science and Technology

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Fossil remains, which provide important information about past life and ecology, are especially important in natural history and life evolution. Recently, many interdisciplinary dating studies have been conducted and many different techniques have been used to investigate the data obtained in this field. Electron Spin Resonance (ESR) (or alternatively, Electron Paramagnetic Resonance, EPR) is one of the methods used in absolute dating and dosimetry studies. It is based on determination of the radiation-centered radicals obtained from the radiation dose absorbed by irradiated materials. One of the important problems in dosimetry and dating studies performed with ESR method is the dependence of experimental parameters on the accumulated dose. The accumulated dose value is effective in determining the actual result of the dating and dosimetric samples. This value is influenced from the stability of the ESR centers, experimental stages, sample preparation or measurement processes. In this study, how the modulation amplitude parameter affects ESR signal intensity in ESR dating and dosimetry studies of tooth enamel investigated. The selective archaeological animal tooth enamel sample was used from the archaeological site of Köşk Höyük, in Turkey for experimental studies. This sample was prepared with combined processes of mechanical and chemical treatment of tooth in laboratory. Tooth enamel sample was irradiated by 60 Co gamma-ray source in dose of 1kGy. After irradiation, ESR spectra were recorded at different modulation amplitude values at room temperature using X-band ESR Spectrometer. According to the results obtained, the most suitable modulation amplitude values for ESR measurements of tooth enamel sample examined in the study.

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Section: Introductionmentioning

confidence: 99%

Determination of Optimal Modulation Amplitude for Electron Spin Resonance (ESR) Dating and Dosimetry Studies of Tooth Enamel

Karataş¹

2020

European Journal of Science and Technology

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“…The EPR spectroscopy is one of the most powerful methods for identifying irradiation damage centers over molecules containing unpaired electrons (Dereli et al (2011), Usta et al (2011), Karatas and Aras (2012), Eaton and Eaton (2008), Gordy (1980), Pshezhetskii and Kotov (1973), Atherton (1973)). Furthermore, this method has been in preference for a long time to produce paramagnetic centers for Electron Paramagnetic Resonance (EPR) technique in order to identification of paramagnetic defect centers and also provides a detailed description for structures mentioned above (Karatas et al (2016), Yarbası et al (2011), Yordanov andAleksieva (2019), Sayin et al (2012)). There are known two EPR parameters (g-value and hyperfine constant (A)) giving the most complete and valuable information about the geometry and electronic structure of radical species and centers (Dereli et al (2011), Gordy (1980, Aras et al (2014)).…”

Section: Introductionmentioning

confidence: 99%

X-BAND EPR STUDIES OF GAMMA IRRADIATED A NEW ISOQUINOLINE SULFONAMIDE: C17H20BrNO3S

Karataş

Ceylan

2020

Konya Journal of Engineering Sciences

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A new epoxyisoquinoline sulfonamide as a fused heterocycle compound (I), (4aS,7S,8aR)-8a-bromo-7-methyl-2-tosyl-2,3,4,7,8,8a-hexahydro-1H-4a,7-epoxyisoquinoline was synthesized using green and cascade progress which was then irradiated by 60 Co-gamma () ray source with a dose speed of 0.981 kGy/h at the room temperature for 72h. EPR spectra of I compound were measured at different orientations in magnetic field with X-band EPR spectrometer along the temperatures between 150-340 K. Isotropic spectrum was obtained without depending on temperature and radical structure, ̇3 was observed. Radical was simulated using the Bruker software WinEPR-Simfonia and the experimental isotropic g-value with hyperfine coupling constant of radical was calculated.

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ESR spectroscopic investigation of gamma-irradiated lithium trifluoromethanesulfonate

Tuner

2019

Radiation Effects and Defects in Solids

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Electron paramagnetic resonance study of gamma (γ)-irradiated methyl 4-methyl benzoate (C₉H₁₀O₂)

Cited by 5 publications

References 32 publications

Determination of Optimal Modulation Amplitude for Electron Spin Resonance (ESR) Dating and Dosimetry Studies of Tooth Enamel

Determination of Optimal Modulation Amplitude for Electron Spin Resonance (ESR) Dating and Dosimetry Studies of Tooth Enamel

X-BAND EPR STUDIES OF GAMMA IRRADIATED A NEW ISOQUINOLINE SULFONAMIDE: C17H20BrNO3S

ESR spectroscopic investigation of gamma-irradiated lithium trifluoromethanesulfonate

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