Chen Hu , Danyang Zhu , Yanbin Wang , Romana Kucerkova , Alena Beitlerova , Martin Nikl , Jiang Li
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引用次数: 0
Abstract
Ce doped Lu3Al5O12 (LuAG:Ce) is a scintillator that attracts attention due to its high light yield, fast scintillation response, and excellent radiation resistance. In this study, optical and scintillation performance of Ca2+ co-doped LuAG:Ce ceramics, fabricated by two-step sintering combined with air annealing, was investigated. In addition, thermoluminescence (TSL) of these LuAG:Ce,Ca ceramics was studied. Decrease of TSL glow curve intensity was observed with increasing Ca2+ content. In particular, the TSL signal becomes hard to detect when Ca2+ content is higher than 0.1 at.%. Ca2+ co-doping is also beneficial for suppressing the slow scintillation component. Sample with Ca2+ co-doping level of 0.1 at.% shows an optimized light yield of 11 700 ph/MeV with scintillation decay showing a high fast component/total intensity ratio of 98.3 %, which is the highest value ever reported in the Ca2+ co-doped LuAG:Ce.
期刊介绍:
The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid.
We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.