与不同类化合物联合合的MgO的热发光特性
P R González1, D Mendoza-Anaya1, O Ávila1
1Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca S/N, La Marquesa, Estado de México C.P., 52750, Ocoyoacac, Mexico.
概括
用三和三 (MgO:Sm,Tb) 添加的氧化对辐射剂量测量具有增强的热发光 (TL) 灵敏度和线性. 这种材料具有较低的检测极限和稳定的读数,使其成为剂量测量应用的有希望的候选材料.
科学领域:
- 材料科学
- 固态物理
- 辐射检测
背景情况:
- 基于氧化 (MgO) 的材料用于热发光 (TL) 剂量测量.
- 将MgO与兰化物联合使用可以改变其TL特性.
- 了解辅助剂对TL反应的影响对于材料开发至关重要.
研究的目的:
- 合成和描述与萨马 (Sm) 和其他化物配合的MgO.
- 评估这些材料的热发光特性,用于辐射剂量测量.
- 为了确定敏感和可靠的剂量计的最佳成分.
主要方法:
- MgO:Sm,Ln粉末的溶液燃烧合成
- 用于剂量计制备的颗粒制造和烧结
- 在60Co马辐射下测量热发光 (TL).
- 使用初始上升,平原和峰值形状方法 (PS,SQPGCD) 分析发光曲线.
主要成果:
- MgO:Sm,Tb (0.4 mol% Sm,0.1 mol% Tb) 显示了最高的TL灵敏度.
- 与单独使用MgO:Sm相比,该样本的灵敏度增加了100%.
- 观察到高达500 Gy的线性,低检测极限为0. 12mGy.
- 材料显示了其剂量峰值的一般顺序动力学.
- 在MgO:Sm,Ce的配合作用是TL信号的抑制剂.
结论:
- MgO:Sm,Tb 是一个非常有前途的热发光材料用于辐射剂量测量.
- 它的增强灵敏度,线性和低检测极限符合关键的剂量测量要求.
- 对MgO:Sm,Tb的进一步研究可能会导致先进的辐射检测装置.
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