Luminescence spectrum of the -doped glass under the excitation with a laser at RT.
Luminescence spectra of the -doped glass after x-ray irradiation for . The spectra were taken under the excitation with a laser at RT (a) and (b). The inset is the dependence of luminescence intensity at ( transition) on the x-ray irradiation time.
The decay profiles of the fluorescence at RT (a) and (b) under the transition by excitation of a laser. The inset is the dependence of decay time on the temperature.
Time evolution of the fluorescence intensity of with different powers of a laser (photobleaching), (a) , (b) , and (c) . The measurements were performed for the x-ray-irradiated sample at RT. The photobleaching curves were fitted with a biexponential function (solid lines).
Power dependence on the fast decay and the slow decay of the photobleaching of ions in the x-ray-irradiated sample.
Optical absorption spectra of as-made glass (a) and x-ray-irradiated sample (b). The inset is the difference between (a) and (b).
TL glow curves of undoped glass (a) and the -doped glass (b). The TL curve (b) is decomposed of two Gaussian components of 156 and .
The proposed microstructure of the ions doped in glass. The ions are suggested to be mainly surrounded by nonbridging oxygen and the structural bridging oxygen of the borate groups.
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