Scintillation properties of cerium-doped Tl2LaCl5 Crystal: Investigating the effects of size and cerium concentration

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry Pub Date : 2025-06-06 DOI:10.1016/j.radphyschem.2025.113059

Lam Tan Truc , Nguyen Thanh Luan , Arshad Khan , Gul Rooh , D.W. Jeong , J. Kaewkhao , H.J. Kim , S. Kothan

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引用次数: 0

Abstract

The cerium-doped Tl₂LaCl₅ (TLC: Ce³⁺) scintillator has emerged as a highly promising material for radiation detection applications such as positron emission tomography (PET), owing to its high effective atomic number (Z_eff) density and excellent scintillation properties. In this study, we grew a large-sized TLC crystal with a diameter of approximately 1 inch; however, the resulting crystal exhibited some cracks. Comprehensive characterization reveals stable light outputs and energy resolutions across different crystal sizes with only a negligible variation observed in large size crystals. In addition, faster decay and rise times are observed with higher cerium concentrations, achieving a significant decay time reduction to 31 ns with 20 % Ce doping, comparable with commercial scintillators such as LaBr₃: Ce³⁺. These findings underscore the potential of TLC: Ce³⁺ as a scalable and high-performance scintillator, suitable for advanced time-of-flight PET applications, despite the challenge posed by its hygroscopic nature for large-scale manufacturing.

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掺铈Tl2LaCl5晶体的闪烁特性：研究尺寸和铈浓度的影响

掺杂铈的Tl2LaCl5 （TLC: Ce3+）闪烁体由于其高的有效原子序数（Zeff）密度和优异的闪烁性能，已成为一种非常有前途的辐射探测材料，如正电子发射断层扫描（PET）。在这项研究中，我们生长了一个直径约为1英寸的大尺寸TLC晶体；然而，所得晶体出现了一些裂纹。综合表征揭示了不同晶体尺寸的稳定光输出和能量分辨率，在大尺寸晶体中观察到的变化可以忽略不计。此外，在较高的铈浓度下，可以观察到更快的衰减和上升时间，当掺杂20%的Ce时，衰减时间显著减少到31 ns，与商用闪烁体（如LaBr3: Ce3+）相当。这些发现强调了TLC: Ce3+作为一种可扩展的高性能闪烁体的潜力，适用于先进的飞行时间PET应用，尽管其吸湿性对大规模制造构成了挑战。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Radiation Physics and Chemistry 化学-核科学技术

CiteScore

5.60

自引率

17.20%

发文量

574

审稿时长

12 weeks

期刊介绍： Radiation Physics and Chemistry is a multidisciplinary journal that provides a medium for publication of substantial and original papers, reviews, and short communications which focus on research and developments involving ionizing radiation in radiation physics, radiation chemistry and radiation processing. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. This could include papers that are very similar to previous publications, only with changed target substrates, employed materials, analyzed sites and experimental methods, report results without presenting new insights and/or hypothesis testing, or do not focus on the radiation effects.