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      https://www.ias.ac.in/article/fulltext/pram/023/05/0573-0593

    • Keywords

       

      Infrared reflectivity; ion-irradiation; annealing; quartz; surface polariton; Kramer-Kronig analysis

    • Abstract

       

      Damage produced inα- and fused quartz bombarded with low energy (∼ 100 keV) D+, He+ and Ar+ ions, has been studied by observing the changes in their spectrum. Besides bulk reflectivity, the attenuated total reflection spectrum has also been studied, the latter with a view to obtaining the surface polariton frequencies. It is observed that for the same fluence, the changes following D+ irradiation are much higher compared to that for Ar+ irradiation. The variation of the surface polariton frequency inα-quartz with the damage energy deposited has the same trend as observed earlier for refractive index. Some annealing studies have also been performed in argon-irradiated samples. These studies indicate that whereas in fused quartz the damaged layer recovers completely, inα-quartz there is a residual amorphization even after annealing. A two-layer model is proposed which gives a reasonable simulation of the observedir properties.

    • Author Affiliations

       

      A K Sood1 2 V Umadevi1 3 R Kesavamoorthy1 G Venkataraman1

      1. Reactor Research Centre, Kalpakkam - 603 102, India
      2. Max-Planck-Institut fur Festkorperforschung, Heisenberg Strasse 1, Stuttgart 80 - 7000, Germany
      3. Department of Physics, University of Missouri, Columbia, Missouri - 65211, USA
    • Dates

       
  • Pramana – Journal of Physics | News

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