Development of Dy3+ doped lithium magnesium borate glass system for thermoluminescence based neutron dosimetry applications

IF 1.4 3区化学 Q4 CHEMISTRY, INORGANIC & NUCLEAR

Radiochimica Acta Pub Date : 2024-03-11 DOI:10.1515/ract-2023-0209

Meghnath Sen, Rakesh Shukla, Raman K. Mishra, Nimai Pathak, Vilippalil Sathian, Probal Chaudhury

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引用次数: 0

Abstract

The manuscript reports the synthesis of Dy3+ incorporated lithium magnesium borate glass by melt quenching technique. FTIR study revealed the presence of both BO3 as well as tetrahedral BO4 units through their characteristic frequencies. Photoluminescence (PL) study of unirradiated samples confirmed the presence of Dy dopant in the ‘+3’ oxidation states from the characteristic emissions at 482, 578, 666 and 716 nm corresponding to 4F9/2 → 6H15/2, 4F9/2 → 6H13/2 and 4F9/2 → 6H11/2, 4F9/2 → 6H9/2 transitions, respectively. Thermal neutron and gamma irradiated PL emission and lifetime characteristics were discussed in details based on the different defect centers. Thermal neutron irradiated TL study showed that the material has a broad and single dosimetry glow peak at about 450 K which showed high fading due to low temperature peak. TL based neutron sensitivity of LMB: Dy3+ was found to be about 37.4 times less than that of standard TLD-100 (LiF: Mg, Ti) powder. The net TL response from about 3 to 83 mSv of neutron dose was found to be linear (Adj. R2 = 0.9994) which is one of the most desirable properties for dosimetry applications. In addition, the TL trap parameters were evaluated using both deconvolution of TL glow curve and peak shape method as suggested by Chen which were found to be matching with each other.

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为基于热释光的中子剂量测定应用开发掺杂 Dy3+ 的硼酸镁锂玻璃系统

该手稿报告了利用熔融淬火技术合成掺杂 Dy3+ 的硼酸镁锂玻璃的过程。傅立叶变换红外光谱（FTIR）研究通过其特征频率揭示了BO3和四面体BO4单元的存在。对未辐照样品进行的光致发光（PL）研究证实了掺杂镝处于 "+3 "氧化态，其特征发射波长分别为 482、578、666 和 716 纳米，分别对应于 4F9/2→6H15/2、4F9/2→6H13/2 和 4F9/2→6H11/2、4F9/2→6H9/2 转变。根据不同的缺陷中心，详细讨论了热中子和伽马射线辐照下的聚勒发射和寿命特性。热中子辐照 TL 研究表明，该材料在约 450 K 时有一个宽的单一剂量测定辉光峰，由于峰值温度较低，辉光峰的衰减程度较高。研究发现，LMB: Dy3+ 的热中子灵敏度是标准 TLD-100（LiF: Mg, Ti）粉末的 37.4 倍。从中子剂量约 3 到 83 mSv 的净 TL 响应是线性的（Adj. R2 = 0.9994），这是剂量测定应用中最理想的特性之一。此外，根据 Chen 的建议，使用 TL 辉光曲线解卷积法和峰形法对 TL 陷波器参数进行了评估，结果发现这两种方法相互匹配。

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

Radiochimica Acta 化学-核科学技术

CiteScore

2.90

自引率

16.70%

发文量

审稿时长

6 months

期刊介绍： Radiochimica Acta publishes manuscripts encompassing chemical aspects of nuclear science and technology.