对CaSO的剂量测量特性进行研究
Anderson M B Silva1, Daniel S Rodrigues1, Patrícia L Antonio2
1Departamento de Física, Universidade Federal de Sergipe, Marechal Rondon, S/N, 49100-000, São Cristovão, SE, Brazil.
概括
这项研究表明,通过缓慢蒸发合成的CaSO4:Mn为辐射剂量计提供了出色的热发光 (TL) 和光学刺激发光 (OSL) 特性,具有高灵敏度和低信号色.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 辐射检测检测器可以检测到辐射.
背景情况:
- 与 (CaSO4:Mn) 合的硫酸是辐射剂量计的一个有前途的材料.
- 研究合成方法对于优化性能至关重要.
- 缓慢的蒸发被探索为CaSO4:Mn的合成途径.
研究的目的:
- 通过缓慢的蒸发路径合成CaSO4:Mn.
- 描述其结构性,热性和光学性能.
- 综合评估其热发光 (TL) 和光学刺激发光 (OSL) 剂量学特征.
主要方法:
- 通过缓慢蒸发进行合成.
- 使用X射线衍射 (XRD),扫描电子显微镜 (SEM),光发光学 (PL) 和热重力学分析 (TGA) 的表征.
- 使用热发光 (TL) 和光学刺激发光 (OSL) 技术进行剂量测量评估,包括剂量反应,色和辐射后最小可检测剂量 (MDD) 的测量.
主要成果:
- 在CaSO4:Mn体中表现出特有的Mn2+排放 (6A1→4T1过渡).
- TL发光曲线显示在494nm左右的突出峰值;OSL衰变是由快速组件主导的.
- 该材料表明线性和可重复的剂量反应从169mGy到10Gy,与其他方法相比,MDD低 (mGy范围) 和信号色减少.
结论:
- 通过缓慢蒸发合成的CaSO4:Mn表现出出色的热发光和光学刺激的发光特性,用于辐射剂量计.
- 该材料具有高TL灵敏度,良好的可重复性和改进的色特性.
- 这种合成途径为辐射检测应用提供了有前途的.
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