Characterisation and unique behaviours of radiophotoluminescence Ag-activated phosphate glass under high-dose gamma and high-LET particle irradiation

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

Radiation Measurements Pub Date : 2025-02-01 DOI:10.1016/j.radmeas.2025.107376

Toshio Kurobori , Yuka Miyamoto , Naoki Takashima , Yuichi Kitagawa , Yasuhiro Koguchi

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引用次数: 0

Abstract

We investigated the optical properties and unique behaviours of radiophotoluminescence (RPL) centres in Ag-activated phosphate glass subjected to a high dose of ⁶⁰Co gamma ray irradiation. Using the absorbance-transmittance excitation-emission matrix technique, we obtained a corrected three-dimensional (3D) matrix that represents the true excitation and emission spectra. Additionally, a similar trend was observed in the dose-dependence of the orange-to-blue RPL intensity ratio for high doses of low linear energy transfer (LET) radiation (in this work) and high LET radiation, such as alpha particles and heavy charged particles (HCPs). However, it was characterised by a rapid decline in orange RPL efficiency (known as ‘LET quenching’). Moreover, we analysed the fluorescence lifetimes and spectra of the components, as observed in the steady-state emission. By tracking the changes in the RPL intensity, fluorescence lifetimes, and peak wavelength shifts as a function of gamma ray dose, we discovered for the first time that blue, green, orange, red, and near-infrared RPL exhibit complex behaviours, such as reduction, enhancement, disappearance, and emergence, while preserving their spectral profiles. We aimed to explore whether Ag-activated phosphate glass could serve as both a dosimeter and tool for evaluating LET values.

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高剂量γ和高let粒子辐照下银活化磷酸盐玻璃的光致发光特性和独特行为

我们研究了高剂量60Co伽马射线辐照下银活化磷酸盐玻璃的光学性质和独特的辐射光致发光（RPL）中心。利用吸收-透射-激发-发射矩阵技术，我们得到了一个代表真实激发和发射光谱的校正三维（3D）矩阵。此外，在高剂量低线性能量传递（LET）辐射（本研究中）和高线性能量传递辐射（如α粒子和重带电粒子（HCPs））的橙色-蓝色RPL强度比的剂量依赖性中也观察到类似的趋势。然而，它的特点是橙色RPL效率迅速下降（称为“LET猝灭”）。此外，我们分析了在稳态发射中观察到的组分的荧光寿命和光谱。通过跟踪RPL强度、荧光寿命和峰值波长位移随伽马射线剂量的变化，我们首次发现蓝色、绿色、橙色、红色和近红外RPL表现出复杂的行为，如减弱、增强、消失和出现，同时保留了它们的光谱剖面。我们的目的是探讨ag活化的磷酸盐玻璃是否可以作为剂量计和评估LET值的工具。

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.