%0 Journal Article
%T Milling-Induced Reset of Thermoluminescence and Deformation of Hydroxyl Species in the Near-Surface Layers of Quartz Grains
%A Akihiro Takeuchi
%A Tetsuo Hashimoto
%J Geochronometria
%@ 1897-1695
%D 2008
%I 
%R 10.2478/v10003-008-0021-x
%X Reset mechanisms of thermoluminescence (TL) signals in the near-surface layers (~500 nm thick) of quartz grains during milling are discussed on the basis of the dependence of TL glow-curves and infrared absorption spectra on grain diameter. TL measurements (heating to 370ˇăC at 1ˇăC/s) indicate that the near-surface layer does not seem to emit TL at ~250-400ˇăC, especially in the blue range, even in TL measurements after re-irradiation. In contrast, the layer seems to emit more TL at ~130ˇăC than the inner original quartz. On the other hand, diffused reflection infrared Fourier transform spectrometry indicates that hydroxyl species (e.g. Al-OH, Li-dependent OH and molecular H2O species) are deformed in the near-surface layer. These two series of data suggest that TL recombination sites in the near-surface layer are deformed or broken during milling and contribute to TL emission unusually strongly.
%K thermoluminescence (TL)
%K diffused reflection infrared fourier transform (DRIFT) spectrometry
%K hydroxyl species
%K quartz
%K milling
%U http://versita.metapress.com/content/202515435010h18j/?p=871bd04d5e1743358d201da35e88badb&pi=7