发射近红外光的掺pr Ca3TaGa3Si2O14晶体闪烁体研究

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2025-04-14 DOI:10.1016/j.jlumin.2025.121255

Ryosei Takahashi, Kai Okazaki, Daisuke Nakauchi, Takumi Kato, Noriaki Kawaguchi, Takayuki Yanagida

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引用次数: 0

摘要

采用浮区法生长了掺Pr的Ca3TaGa3Si2O14 （Pr:CTGS）晶体。所有制备的样品在光致发光（PL）和x射线诱导闪烁测量中都显示出Pr3+的发射峰和衰减时间常数。0.05、0.1、0.5、1和2%掺pr样品的PL量子产率分别为34.4、53.4、29.5、21.9和15.7%。所有样品在近红外范围内的x射线照射剂量率与输出信号呈线性响应。1% Pr:CTGS样品的检测下限为4.8 mGy/h。

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Investigation of Pr-doped Ca3TaGa3Si2O14 crystal scintillator emitting near infrared light

Pr-doped Ca₃TaGa₃Si₂O₁₄ (Pr:CTGS) crystals were grown by the floating zone method. All the prepared samples showed emission peaks and decay time constants of Pr³⁺ on the photoluminescence (PL) and X-ray-induced scintillation measurements. The PL quantum yields of the 0.05, 0.1, 0.5, 1, and 2 % Pr-doped samples were respectively 34.4, 53.4, 29.5, 21.9, and 15.7 %. All the samples showed linear responses between X-ray exposure dose-rate and output signals in NIR ranges. The 1 % Pr:CTGS sample showed the lower detection limit of 4.8 mGy/h when evaluated by three standard deviations of background signals.

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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.