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      https://www.ias.ac.in/article/fulltext/boms/032/05/0515-0519

    • Keywords

       

      Al2O3; swift heavy ions; Raman spectra; photoluminescence; amorphization.

    • Abstract

       

      Polycrystalline aluminum oxide is synthesized by combustion technique and XRD studies of the sample revealed the 𝛼-phase. The synthesized sample is irradiated with 120 MeV swift Au9+ ions for the fluence in the range from 1 × 1011 to 1 × 1013 ions cm-2. A broad photoluminescence (PL) emission with peak at ∼447 nm and two sharp emissions with peak at ∼ 679 and ∼ 695 nm are observed in pristine when sample was excited with 326 nm. However, in the irradiated samples the PL intensity at ∼ 447, 679 and 695 nm decreases with increase in ion fluence. The 𝛼-Al2O3 gives rise to seven Raman modes with Raman intensity with peaks at ∼ 253, 396, 417, 546, 630, 842, 867 cm-1 observed in pristine. The intensity of these modes decreases with increase in ion fluence. However, the Raman modes observed at lower fluences are found to disappear at higher fluence.

    • Author Affiliations

       

      K R Nagabhushana1 B N Lakshminarasappa1 Fouran Singh2

      1. Department of Physics, Jnanabharathi, Bangalore University, Bangalore 560 056, India
      2. Inter University Accelerator Centre, P.O. Box No. 10502, New Delhi 110 067, India
    • Dates

       
  • Bulletin of Materials Science | News

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