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    Assessment of natural radioactivity and radiological risk of sediment samples in Karacaören II dam Lake, Isparta/Turkey
    (Alanya Alaaddin Keykubat Üniversitesi, 2019) Apaydın, Gökhan; Köksal, Oğuz Kağan; Cengiz, Erhan; Tıraşoğlu, Engin; Baltaş, Hasan; Karabulut, Kazım; Söğüt, Ömer
    This research aimedto assess natural radioactivity levels in lake sediment of Karacaören II Dam.In this study sediment samples were collected from 12 station of lake in May,2016. The natural radionuclides 226Ra, 232Th and 40K were measured with a coaxialHPGe detector (Canberra, GC 1519 model) of 15% relative efficiency and aresolution of 1.9 keV at the 1332 keV gamma of 60Co. In order to assess the radiological hazards resulting from naturalradioactivity, radium equivalent activities (Raeq), absorber dose rate (D), internal (Hin)and external (Hex) hazard index,annual effective dose rate (AED) andExcess life time cancer risk (ELCR)were calculated and compared with recommended values of internationalorganizations.
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    Öğe
    Examination of polymeric azomethine compounds and their transition metal complexes by using XRF and XRD technique
    (Office Spectroscopy & Spectral Analysis, 2020) Söğüt, Ömer; Kara, Betül Demirezen; Apaydın, Gökhan; Cengiz, Erhan; Kazancı, Ayşe
    In this study, the electronic transition properties and structural analysis of the metal complexes (Ni (II), Co(II), Cu( II) and Mn( II)) of three different polymer ligands were performed by using XRF and X-ray diffraction (XRD) techniques, respectively. The structural analysis of the polymers and their complexes were performed by XRD technique and some of the polymers were found to be in the face-centred cubic (fcc) structure. In addition, the values of the present K X-ray intensity ratios are significantly greater than the values reported in literature.
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    Öğe
    Examination of the change of the characteristic X-rays of the Zinc in fluorine- and boron-doped ZnO thin films
    (Polish Acad Sciences Inst Physics, 2018) Söğüt, Ömer; Kerli, Süleyman; Cengiz, Erhan; Apaydın, Gökhan
    In this study, K-beta / K-alpha X-ray intensity ratios of zinc in pure zinc, undoped ZnO thin film and boron and fluorine-doped ZnO thin films have been investigated. These samples have been excited by 59.5 keV gamma-rays from a Am-241 annular radioactive source. K X-rays emitted by the samples have been counted using an Ultra-LEGe detector with a resolution of 150 eV at 5.9 keV. The K-beta / K-alpha X-ray intensity ratios of the doped ZnO thin films have been compared with that of the undoped ZnO thin film. The deviations between the results can be explained by delocalization and/or charge transfer phenomena causing change in valence electronic configuration of zinc.
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    Öğe
    Investigation of mass attenuation coefficients ofcopper-silverthin films at 14.93-48.82keVenergy range
    (Wiley, 2020) Söğüt, Ömer; Cengiz, Erhan; Yavuz, Musab
    In this study, the mass attenuation coefficients of copper-silver thin-film alloys, produced by the thermal evaporation method at various concentrations, were measured at six different energies in the range of 14.93-48.82 keV (keV) by X-ray Fluorescence technique (XRF). A(241)Americium radioisotope source, having 50 mCi intensity and 59.54 keV energy photons, was used to stimulate the samples, and an Ultra-LEGe detector was used to count the characteristic X-rays emitted from the samples and from the source. At 14.93, 17.44, and 23.10 keV energies, the mass attenuation coefficients of Cu-Ag thin-film alloys increased with increasing Cu concentration, while decreasing with increasing Cu concentration at 27.37, 32.068, and 48.82 keV energies. However, at 14.93, 17.44, and 23.10 keV energies, the mass attenuation coefficients decreased with increasing Ag concentration, while increasing with increasing Ag concentration at 27.37, 32.068, and 48.82 keV energies. The obtained results were compared with the values theoretically predicted by XCOM, and the experimental results are in good agreement with theoretical values within the error limits.