Photo- and X-ray excited luminescence, thermoluminescence and scintillation characteristics of LuGd2Al3Ga2O12:Ce,Mo single crystal scintillators: Influence of Mo co-doping

IF 3.8 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2026-04-01 Epub Date: 2026-01-03 DOI:10.1016/j.jlumin.2026.121737

Warut Chewpraditkul , Nakarin Pattanaboonmee , Weerapong Chewpraditkul , Ongsa Sakthong , Masao Yoshino , Takahiko Horiai , Shunsuke Kurosawa , Kei Kamada , Romana Kucerkova , Alena Beitlerova , Tingsong Li , Yanbin Wang , Chen Hu , Jiang Li , Vlademir Babin , Martin Nikl , Akira Yoshikawa

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引用次数: 0

Abstract

Mo co-doped LuGd₂Al₃Ga₂O₁₂:Ce,Mo (Mo = 0, 300, 600 ppm) single crystals were grown by the micro-pulling-down method. The optical absorption and X-ray excited luminescence spectra, temperature dependence of photoluminescence decay kinetics, afterglow and thermoluminescence (TL) intensity, and scintillation properties (light yield, LY, and decay time) were investigated. The quenching temperature of 355 K was determined from temperature-dependent photoluminescence decay kinetics in the temperature range of 77–487 K under excitation in the 4f - 5d₁ absorption band of the Ce³⁺ ions. Under excitation of 662 keV γ rays, the LuGd₂Al₃Ga₂O₁₂:Ce,Mo600 sample showed high LY value of 32,900 photons/MeV, energy resolution of 7.6 %, and scintillation decay time of 119 ns (38 %) + 475 ns (62 %). The lower LY value together with higher contribution of slower scintillation decay component among the samples studied was observed for LuGd₂Al₃Ga₂O₁₂:Ce,Mo300 sample, consistently with its higher afterglow intensity and longer de-trapping time of the dominant TL glow peak at 356 K.

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LuGd2Al3Ga2O12:Ce，Mo单晶闪烁体的光激发发光、热发光和闪烁特性：Mo共掺杂的影响

采用微拉下法制备了Mo共掺杂LuGd2Al3Ga2O12:Ce，Mo （Mo = 0,300, 600 ppm）单晶。研究了光吸收和x射线激发发光光谱、光致发光衰变动力学、余辉和热致发光（TL）强度以及闪烁特性（产光量、LY和衰变时间）的温度依赖性。在Ce3+离子的4f - 5d1吸收带激发下，在77 ~ 487 K的温度范围内，根据温度依赖的光致发光衰变动力学确定了355 K的猝灭温度。在662 keV γ射线激发下，LuGd2Al3Ga2O12:Ce，Mo600样品的LY值高达32900光子/MeV，能量分辨率为7.6%，闪烁衰减时间为119 ns (38%) + 475 ns（62%）。LuGd2Al3Ga2O12:Ce，Mo300样品具有较低的LY值和较慢的闪烁衰减分量的较高贡献，且在356k时具有较高的余辉强度和较长的脱捕获时间。

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

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.