Combined Cathodoluminescence and Micro-Raman Study of Helium-Ion-Implanted Albite

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...

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Bibliographic Details
Published in:Spectroscopy letters 2011-01, Vol.44 (7-8), p.526-529
Main Authors: Kayama, Masahiro, Nishido, Hirotsugu, Toyoda, Shin, Komuro, Kosei, Ninagawa, Kiyotaka
Format: Article
Language:English
Subjects:
albite
Cathodoluminescence
cathodoluminescence halo
Crystal defects
Deconvolution
Emission
Emission spectroscopy
Ion implantation
Raman spectroscopy
Spectral emissivity
Texture
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Summary: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.
ISSN:0038-7010
1532-2289
DOI:10.1080/00387010.2011.610415