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  • Küçük Resim
    Öğe
    Determination of valence electronic structure of Ni in Ni-B alloy coatings using K?-to-K? X-ray intensity ratios
    (Pergamon-Elsevier Science Ltd, 2019) Cengiz, Erhan; Koksal, Oguz Kagan; Apaydin, Gokhan; Karahan, Ismail Hakki; Unal, Ersin
    In this study, K-beta-to-K-alpha X-ray intensity ratios of Ni in Ni-B alloy coatings were investigated. These samples were excited by 59.5 keV gamma-rays from a Am-241 annular radioactive source. K X-rays emitted by the samples were counted using an Ultra-LEGe detector with a resolution of 150 eV at 5.9 keV. The K-beta-to-K-alpha X-ray intensity ratios of Ni-B alloys are compared with pure Ni and each other. Deviations between the results were explained by the change in valence electronic structures of Ni in Ni-B alloy coatings.
  • Küçük Resim
    Öğe
    A research on the gamma ray attenuation characteristics for real bone and manganese substituted artificial bone dust
    (2020) Koksal, Oguz Kagan; Tozar, Ali; Cengiz, Erhan; Karahan, Ismail Hakki; Apaydın, Gökhan
    This research focalized on the gamma ray attenuation charesteristics of real bone andHistory:manganese substituted Nano hydroxyapatite artificial bone dusts. The current samples wereReceived:24.03.2019excited with using 59.5 keV photons emitted from an 241Am annular radioisotope source withAccepted:29.01.202050 mCi activity by using a narrow beam transmission geometry and detected with using UltraKeywords:Low Energy Germanium detector with a resolution 150 eV at 5,95 keV experimentally. TheAttenuationgamma-ray attenuation parameters such as linear attenuation coefficient, half value layer, tenthcharesteristics, Mnvalue layer and mean free path are also calculated experimentally and theoretically. Thesubstituted artificialpresent results points out that the attenuation values of the manganese substitutedbone dust, Real bone,hydroxyapatite artificial bone dust is very close to the value of the real bone.Transmission