Combined cathodoluminescence and micro-Raman study of Helium-Ion-Implanted albite

Masahiro Kayama, Hirotsugu Nishido, Shin Toyoda, Kosei Komuro, Kiyotaka Ninagawa

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Cathodoluminescence (CL) spectra of experimentally radiated albite at 4.0 MeV energy of He+ ion implantation have red emissions at 700-750 nm, of which the intensities increase with an increase in the radiation dose. These emissions are assigned to a radiation-induced defect center. Pseudocolor CL images of the implanted samples show red CL halo on the implanted surface, of which thickness is approximately 14 μm corresponding to a theoretical range of He+ ion implantation of 4.0 MeV. 2D Raman mapping of the peak at 508 cm-1 for CL halo area indicates minimum intensity and maximum full width at half maximum at ̃14 μm from the implanted surface, suggesting production of radiation-induced defect center due to a partial breaking of the framework structure. CL spectral deconvolution of the red emission reveals a Gaussian component at 1.861 eV attributed to the defect center. The integral intensity of this component closely correlates with the radiation dose as a function of radiation-induced defect center, but does not depend on the density and distribution of other emission centers related to CL of albite, the presence of microstructures or texture, and crystallographic orientation. CL spectral deconvolution is expected to be used for quantitative estimation of alpha radiation dose from natural radionuclides on Na-rich feldspar as an indicator for geodosimetry.

Original languageEnglish
Pages (from-to)526-529
Number of pages4
JournalSpectroscopy Letters
Volume44
Issue number7-8
DOIs
Publication statusPublished - 2011

Keywords

  • Albite
  • Cathodoluminescence
  • Cathodoluminescence halo
  • He ion implantation
  • Raman spectroscopy

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy

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