会议论文详细信息
5th International Congress on Energy Fluxes and Radiation Effects 2016
The deformation stimulated luminescence in KCl, KBr and KI crystals
Shunkeyev, K.^1 ; Sergeyev, D.^1 ; Drozdowski, W.^2 ; Brylev, K.^2 ; Myasnikova, L.^1 ; Barmina, A.^1 ; Zhanturina, N.^1 ; Sagimbaeva, Sh^1 ; Aimaganbetova, Z.^1
Zhubanov Aktobe Regional State University, Aktobe, Kazakhstan^1
Nicolaus Copernicus University in Torun, Torun, Poland^2
关键词: Alkali-halide crystals;    Different sizes;    Lattice symmetry;    Luminescence band;    Radiation defects;    Self-trapped exciton;    Stimulated luminescence;    Thermal destruction;   
Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/830/1/012139/pdf
DOI  :  10.1088/1742-6596/830/1/012139
来源: IOP
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【 摘 要 】

Currently, strengthening of the intensity of luminescence in alkali halide crystals (AHC) at lattice symmetry lowering is discussed as a promising direction for the development of scintillation detectors [1-3]. In this regard, for the study of anion excitons and radiation defects in the AHC anion sublattice at deformation, the crystals with the same sizes of cations and different sizes of anions were chosen. In the X-ray spectra of KCl at 10 K, the luminescence at 3.88 eV; 3.05 eV and 2.3 eV is clearly visible. The luminescence at 3.05 eV corresponds to the tunneling recharge [F∗, H]. Luminescence at 3.88 eV is quenched in the region of thermal destruction of F′-centers and characterizes tunneling recharge of F′, VK-centers. In KCl at 90 K, the luminescence of self-trapped excitons (STE) is completely absent. In KBr at deformation not only STE luminescence, but also deformation stimulated luminescence at 3.58 eV were recorded, the last one corresponds to tunneling recharge of F′, VK-centers. In KI crystal at 10 K and 90 K at deformation, only STE luminescence is enhanced. There are no deformation luminescence bands in KI compares with KBr and KCl crystals.

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