Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5397369 | Journal of Luminescence | 2017 | 4 Pages |
Abstract
Bismuth silicate single crystals doped with rare-earth dysprosium (Dy) were excited by ultra-violet laser pulses with pulse width of 100Â ps and wavelength of 266Â nm, the lifetime and spectra of the fluorescence were observed. After the samples were irradiated at liquid nitrogen temperature, the thermoluminescence was measured at the rate of 1Â K/s. Fluorescence experiments show that the lifetime of the slow decay component is about 100Â ns, and the fast decay component is weak; The incorporation of a small amount of Dy can enhance the fluorescent intensity, and so do to the lifetime of slow decay component of the fluorescence; the fluorescence intensity and lifetime decrease while the doping concentration is too large. Low temperature thermoluminescence measurements show that there are thermoluminescence peaks near 176Â K and 230Â K, and the corresponding energies of thermoluminescence traps are 0.27Â eV and 0.36Â eV. The presence of these shallow traps may attenuate the fast decay components of the crystal's fluorescence.
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Authors
Zhengye Xiong, Jiayue Xu, Fuli Zhao, Yan Zhang, Jun Liu, Qiang Tang,