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沙子样本在TL辐射剂量计中的可用性

Waiel E Madcour¹, Amany Y Shahein², Hanaa S Hafez¹

¹Radiation Protection Department, NRC, Egyptian Atomic Energy Authority, Cairo, Egypt.

Radiation and environmental biophysics

|May 6, 2024

概括

自然沙子表现出适合回顾性高剂量玛剂量测量的热发光 (TL). 一些埃及的沿海沙子,特别是来自拉斯塞德尔的沙子,在评估高达30千吉年的意外辐射暴露时显示出可靠性.

科学领域:

地质物理学地质物理学
辐射剂量计辐射剂量计
材料科学材料科学材料科学

背景情况:

热发光 (TL) 是测量吸收辐射剂量的敏感方法.
像沙子这样的自然材料有可能作为被动剂量计.
评估回顾性高剂量玛辐射暴露对于事故分析至关重要.

研究的目的:

为了评估自然沙子的热发光响应,用于回顾性高剂量玛剂量测量.
调查埃及沿海沙子是否适合用于辐射剂量评估.
为了确定沙子作为TL剂量计的可靠性和局限性.

主要方法:

从六个埃及沿海地点收集天然沙子样本.
对热发光 (TL) 剂量反应,发光曲线和色率的分析.
能量分散式X射线光谱 (EDX) 用于化学成分分析.

主要成果:

EDX分析揭示了影响TL强度的化学成分的变化.
拉斯塞德尔,塔巴,苏伊士和恩沙斯的沙子样本显示了可用的TL模式.
高石砂 (马特鲁,北海岸) 缺乏10Gy和30kGy之间的线性反应.
大多数样本适合意外暴露水平,Ras Sedr沙是最可靠的.

结论:

自然的沙子,特别是来自特定的埃及沿海地区的沙子,可以作为回顾性玛剂量计.
在适当校准的情况下,TL技术可用于评估3至30kGy的意外辐射剂量.
沙子样本表现出稳定的色率,提高了它们在剂量重建中的有用性.

关键词:

色和线性的一致性发光曲线的发光曲线是沙子沙子沙子沙子热发光剂量测量方法

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