Effects of alkali earth metal doping on the luminescence and scintillation properties of Cs2HfCl6 single crystals

IF 1.6 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY

Radiation Measurements Pub Date : 2025-04-15 DOI:10.1016/j.radmeas.2025.107438

Shuangliang Cheng , Alena Beitlerova , Romana Kucerkova , Martin Nikl , Shunsuke Kurosawa , Guohao Ren , Yuntao Wu

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引用次数: 0

Abstract

In recent years, intrinsic self-trapped exciton (STE) emission materials have been developed as promising scintillators due to their bright and self-absorption free luminescence. Among these materials, cesium hafnium chloride (Cs₂HfCl₆, CHC) has received attention for its high light yield, remarkable energy resolution, high radiation-stopping capability, absence of radioactive background, and low non-proportionality. This study investigated the luminescence and scintillation properties of both the undoped and alkali earth metals (AE)-doped CHC. The findings revealed that undoped and AE-doped CHC exhibited four emission peaks at 368, 383, 435, and 465 nm, corresponding to intrinsic STE emission, defect-related emission, Zr-related emission, and I-related emission, respectively. The corresponding decay time were about 1.5, 5.5, 11, and 2.3 μs. Notably, AE doping did not introduce any new emission centers, as confirmed by photoluminescence and radioluminescence spectra. The light yield and energy resolution for undoped CHC and CHC:AE were measured to be 34,000–37,000 ph/MeV and 3.5–4.1 % at 662 keV, respectively. Although AE doping did not enhance scintillation properties of CHC, this study elucidated several sources of luminescence centers in CHC, providing valuable insights for future optimization of its scintillation properties.

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碱土金属掺杂对Cs2HfCl6单晶发光和闪烁性能的影响

近年来，本征自困激子（STE）发射材料因其明亮的无自吸收发光特性而成为一种很有前途的闪烁体。其中，氯化铪铯（Cs2HfCl6， CHC）以其高产光率、显著的能量分辨率、高的阻挡辐射能力、无放射性本底、低非比例性等特点而备受关注。本文研究了未掺杂和碱土金属（AE）掺杂CHC的发光和闪烁特性。结果表明，未掺杂和ae掺杂的CHC在368、383、435和465 nm处表现出4个发射峰，分别对应于本征STE发射、缺陷相关发射、zr相关发射和i相关发射。相应的衰减时间分别为1.5、5.5、11和2.3 μs。值得注意的是，通过光致发光和放射发光光谱证实，AE掺杂没有引入任何新的发射中心。在662 keV下，未掺杂CHC和CHC:AE的光产率和能量分辨率分别为34,000 ~ 37,000 ph/MeV和3.5 ~ 4.1%。虽然AE掺杂并没有增强CHC的闪烁性能，但本研究阐明了CHC中发光中心的几个来源，为今后优化CHC的闪烁性能提供了有价值的见解。

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 Measurements 工程技术-核科学技术

CiteScore

4.10

自引率

20.00%

发文量

116

审稿时长

48 days

期刊介绍： The journal seeks to publish papers that present advances in the following areas: spontaneous and stimulated luminescence (including scintillating materials, thermoluminescence, and optically stimulated luminescence); electron spin resonance of natural and synthetic materials; the physics, design and performance of radiation measurements (including computational modelling such as electronic transport simulations); the novel basic aspects of radiation measurement in medical physics. Studies of energy-transfer phenomena, track physics and microdosimetry are also of interest to the journal. Applications relevant to the journal, particularly where they present novel detection techniques, novel analytical approaches or novel materials, include: personal dosimetry (including dosimetric quantities, active/electronic and passive monitoring techniques for photon, neutron and charged-particle exposures); environmental dosimetry (including methodological advances and predictive models related to radon, but generally excluding local survey results of radon where the main aim is to establish the radiation risk to populations); cosmic and high-energy radiation measurements (including dosimetry, space radiation effects, and single event upsets); dosimetry-based archaeological and Quaternary dating; dosimetry-based approaches to thermochronometry; accident and retrospective dosimetry (including activation detectors), and dosimetry and measurements related to medical applications.