Evaluation of dosimetric properties of LiAlO2:Gd for detection and discrimination of thermal neutron in mixed field environment

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.2024.107370

Pragya R. Jopat , Sabyasachi Paul , M.S. Kulkarni , Shashwati Sen

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引用次数: 0

Abstract

The study demonstrates the capability of the newly developed LiAlO₂:Gd³⁺, a thermal neutron sensitive phosphor as a potential dosimeter for personnel dosimetry applications. The co-existence of both photon and neutron sensitive materials expands its application domain in both photon and neutron radiation environments. The phosphor has been tested in both photon and neutron reference fields to quantify its sensitivity to both radiation types. Subsequently after evaluating the photon sensitivity in the reference photon field, the neutron ambient dose equivalent quantification has been performed in the mixed radiation environment of the thermal neutrons. Extendibility of the phosphor for simultaneous evaluation of the neutron and photons fractions in a mixed radiation field has also been investigated with and without applying a Cd-filter to eliminate the thermal neutrons. The conventional dual dosimeter approach with preferential sensitivity to a specified radiation type has also been revisited for validation purposes with a comparison between the thermo-luminescence response of three types of dosimeters, MCP-600 (⁶LiF:Mg,Cu,P), MCP-700 (⁷LiF:Mg,Cu,P) and LiAlO₂:Gd³⁺ (0.5% mol). The newly developed phosphor material has been applied in pair with the commercially available photon sensitive MCP-700 detectors for quantitative estimation of the neutron fraction. The response variations were verified with MCP-600 and MCP-700 dosimeter pair at different irradiation intervals in the standard thermal neutron reference fields. The dose estimates were found to be reproducible and precise in comparison to the conventional (MCP-600 and MCP-700) dosimeter pair with enhanced thermo-luminescence response per unit thermal neutron ambient dose equivalent in the mixed radiation environment.

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LiAlO2:Gd在混合场环境中热中子探测与鉴别的剂量学性质评价

该研究证明了新开发的LiAlO2:Gd3+，一种热中子敏感荧光粉作为人员剂量测量应用的潜在剂量计的能力。光子和中子敏感材料的共存扩展了其在光子和中子辐射环境中的应用领域。在光子和中子参考场中测试了荧光粉，以量化其对两种辐射类型的灵敏度。在评价了参考光子场中的光子灵敏度后，在热中子的混合辐射环境中进行了中子环境剂量当量量化。还研究了在混合辐射场中同时评价中子和光子分数的荧光粉的可扩展性，并在使用和不使用cd滤波器消除热中子的情况下进行了研究。通过比较MCP-600 （6LiF:Mg,Cu，P）、MCP-700 （7LiF:Mg,Cu，P）和LiAlO2:Gd3+ (0.5% mol)三种剂量计的热发光响应，对传统的双剂量计对特定辐射类型具有优先敏感性的方法进行了验证。新开发的荧光粉材料已与市售的光子敏感MCP-700探测器配对应用于中子分数的定量估计。用MCP-600和MCP-700剂量计对在标准热中子参考场中不同辐照间隔下验证了响应变化。与传统剂量计对（MCP-600和MCP-700）相比，剂量估计具有可重复性和准确性，在混合辐射环境中单位热中子环境剂量当量的热发光响应增强。

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.