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  • Küçük Resim
    Öğe
    A comprehensive research on gamma-ray attenuation characteristics of the metal-doped hap and natural animal bone
    (Gümüşhane Üniversitesi, 2020) Köksal, Oğuz Kağan; Cengiz, Erhan; Tozar, Ali; Karahan, İsmail Hakkı; Apaydın, Gökhan
    This investigation focuses on the gamma ray attenuation parameters of natural animal bone, iron, cobalt, copper and zinc doped Nano hydroxyapatite artificial bone powders and pure hydroxyapatite. The present specimens were excited by means of gamma ray photons with 59.5 keV energy radiated from a 241-Amercium annular radioactive source with 50 mCi activity by means of narrow beam transmission geometry. The transmitted gamma-rays were counted with using Ultra Low Energy Germanium (Ultra-LEGe) detector with a resolution 150 eV at 5.95 keV. The gamma-ray attenuation characteristics such as mass attenuation coefficient (MAC) (µ/ρ), linear attenuation coefficient (LAC) (µ), half value layer (HVL), tenth value layer (TVL) and mean free path (MFP), which has a significant role in the attenuation studies, are also calculated. The values obtained were checked with the predicted values from the XCOM NIST. The results show that the attenuation data of the metal-doped hydroxyapatite synthetic bone dust is very close to the value of the natural animal bone.
  • Küçük Resim
    Öğe
    Investigation of the X-ray fluorescence parameters and valance electronic structure for Ni in Ni-B/hBN coating materials with doped TMAB and saccharine
    (2022) Köksal, Oğuz Kağan; Karahan, İsmail Hakkı
    In this investigation, K shell valance electronic structure of Ni in Ni-B alloy coatings were studied by means of collecting the X-ray emission and XRD spectra. The data obtained were evaluated in terms of the K beta/K alpha X-ray intensity ratios and XRD data. The coated alloys were fabricated with using different concentrations of hexagonal boron nitride (hBN) for this study by electrochemical storage method. Besides saccharine and trimethylamine borane complex (TMAB) were added the current samples at constant concentration. The current specimens were excited by 59.5 keV photons from a 241Am annular radioactive source. K shell X-rays emitted by the specimens were detected by means of an Ultra-LEGe detector with a resolution of 150 eV at 5.9 keV. The K shell X-ray intensity ratios of Ni-B alloys are checked with pure Ni. Variations in the current outcomes were interpreted by the variation in valence electronic structures of Ni in Ni-B/hBN coating materials with doped TMAB and saccharine.