Special MCP-N thermoluminescent detectors (TLD) with better angular dependence

IF 1.6 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY Radiation Measurements Pub Date : 2024-07-27 DOI:10.1016/j.radmeas.2024.107245

M. Budzanowski , A. Jung , M. Karczmarczyk

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Abstract

One of the basic parameters in the use of thermoluminescent detectors is the angular characteristics, i.e. receiving different signals depending on the angle of radiation exposure. The TLD detector is typically installed in a slide/badge and here the angular characteristics may have an influence, adding non-uniform coverage of the detectors with filters for the correct determination of the dose as a function of energy, because the energy characteristics are usually not flat.

As part of the work, special MCP-N (LiF:Mg, Cu, P) detectors of various shapes were prepared to improve the angular characteristics. The detectors were round pellets with the same circular shape with a diameter of 4.5 mm, and a modified form inside (large and small drilled holes) or a modified surface (cavity or hemisphere). For comparison, standard MCP-N type detectors were used. Detectors in special boxes were exposed to X-rays with an energy of 80 keV. The radiation beam was formed by a medical X-ray apparatus adapted for experiments at the Warsaw University of Technology in Warsaw. Exposures were made for angles of 0, 30, 45, 50, and 90° for a dose of 1.5 mGy.

Results show that it is possible to improve the angular characteristics for detectors with modified shapes. Better angular characteristics will allow for more accurate measurements, in particular in comparison tests, for accreditation and other calibrations. Especially improved angular dependence detectors could be useful for H*(10) environmental measurements.

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特殊的 MCP-N 热释光探测器（TLD）具有更好的角度依赖性。

使用热释光探测器的基本参数之一是角度特性，即根据辐射照射的角度接收不同的信号。热释光探测器通常安装在幻灯片/徽章中，角度特性可能会对其产生影响，因为能量特性通常不是平的，所以在正确确定剂量与能量的函数关系时，会增加过滤器对探测器的不均匀覆盖。这些探测器是直径为 4.5 毫米、形状相同的圆形颗粒，内部形状有所改变（钻有大孔和小孔）或表面有所改变（空腔或半球形）。为了进行比较，使用了标准的 MCP-N 型探测器。装在特殊盒子里的探测器受到能量为 80 keV 的 X 射线照射。辐射光束由华沙华沙理工大学为实验改装的医用 X 射线装置形成。照射角度为 0、30、45、50 和 90°，剂量为 1.5 mGy。更好的角度特性将使测量结果更加精确，特别是在对比试验、认证和其他校准中。特别是经过改进的角度依赖性探测器可以用于 H*(10)环境测量。

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.