The transformation balance between two types of structural defects in silica glass in ion-irradiation processes

Tengfei Yang, Yuan Gao, Xuejun Huang, Yanwen Zhang, Marcel Toulemonde, Jianming Xue, Sha Yan, Yugang Wang

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Structural modification in silica glass irradiated by Au ions was investigated by ultraviolet (UV), photoluminescence and Raman spectrum at the energies from 0.5 to 8 MeV with a fluence of 5 × 1013 cm - 2. In this transit energy region, both nuclear energy loss and electronic energy loss are not negligible. It was found that both the formation of irradiation-induced intrinsic defects and structural transformation from irregular large ring structure (LRS) to small three- and four-member ring structures (SRS) are dominated by the nuclear energy loss. Furthermore, unlike the case of irradiation with β, γ or proton, the concentration of non-bridging oxygen hole center is much enhanced followed with a distinct peak appearing at 5.05 eV in the UV absorption spectra that is attributed to divalent Si. The results suggest that the structural modification in silica glass in the transit energy region is dominated by nuclear energy loss. A mutual transformation balance model among irradiation-induced intrinsic defects, LRS and SRS is established to interpret the identical variation tendencies of intrinsic defects and structural transformation with ion energy.

Original languageEnglish
Pages (from-to)3245-3250
Number of pages6
JournalJournal of Non-Crystalline Solids
Volume357
Issue number16-17
DOIs
StatePublished - Aug 2011
Externally publishedYes

Keywords

  • Intrinsic defect
  • Ion irradiation
  • Nuclear energy loss
  • Silica glass
  • Structural modification

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