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    題名: Effect of swift heavy ions in Ni-Al nanocrystalline films studies by x-ray absorption spectroscopy
    作者: Asokan, K.;Tsai, H.-M.;Bao, C.-W.;Chiou, J.-W.;Pong, W.-F.;Sonia, G.;Anand, T.-J.-S.
    貢獻者: 淡江大學物理學系
    關鍵詞: XANES;Intermetallic alloys;Ni–Al alloys;Swift heavy ions
    日期: 2008-07
    上傳時間: 2011-10-24 10:36:57 (UTC+8)
    出版者: Elsevier BV
    摘要: X-ray absorption spectroscopic measurements have been used to compare the electronic structures of swift heavy ions (100 MeV Si ions) irradiated and pristine Ni–Al nanocrystalline films. Results from X-ray diffraction (XRD), X-ray absorption near-edge structure (XANES) spectra at Al K-, and Ni L2,3-edges and extended X-ray absorption fine structure (EXAFS) at Ni K-edges are discussed. The observed XRD peaks indicate the improvement of crystalline nature and Al(1 1 1) clustering after the swift heavy ion interactions. While the XANES spectra at Ni L2,3-edges show decrease in the intensity of white line strength, the Al K-edge shows increase in intensity after irradiation. Above results imply that swift heavy ions induce low Z (i.e., Al) ion mass transport, changes in Al sp-Ni–d hybridization, and charge transfer. EXAFS results show that crystalline nature is improved after swift heavy irradiation which is consistent with XRD results.
    關聯: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pages 70(2), pp.454–457
    DOI: 10.1016/j.saa.2007.11.031
    顯示於類別:[物理學系暨研究所] 期刊論文

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