内部静电场对具有高灵敏度和低检测极限的自动电源X射线探测器在极氧化物晶体α/β-BaTeMo2O9中的影响
Fuai Hu1, Feifei Guo1, Wenxiang Mu1
1State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan, 250100, China.
Small (Weinheim an der Bergstrasse, Germany)
|April 18, 2025
概括
高性能自动供电的X射线探测器是使用极性 tellurium 氧化物 (BaTeMo2O9) 晶体开发的. 这些探测器具有卓越的灵敏度和稳定性,为先进的便携式辐射探测铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 探测器技术 探测器技术
背景情况:
- 自动供电的X射线探测器在工业和医疗应用中提供了便携性和价值.
- 传统的探测器面临着黑暗电流和光电流之间的权衡.
研究的目的:
- 展示使用极性α-BaTeMo2O9 (α-BTM) 和β-BaTeMo2O9 (β-BTM) 氧化物晶体的高性能自动供电X射线探测器.
- 调查极氧化物晶体自动供电探测器内部静电场的作用.
主要方法:
- 使用α-BTM和β-BTM晶体制造和表征自动供电的X射线探测器.
- 测量探测器灵敏度,暗电流和在X射线照射下稳定性的测量.
- 对内部静电场和离子激活能量的分析.
主要成果:
- 该β-BTM探测器的灵敏度为300.2μCGyair-1cm-2,是α-Se探测器的15倍.
- 极地结构诱导了34V mm-1 (α-BTM) 和66V mm-1 (β-BTM) 的内部静电场.
- 由于高离子激活能 (>828 meV),BTM晶体表现出极好的稳定性和低暗电流.
结论:
- 极性晶体中的内部静电场驱动载体,提高了自动供电探测器的性能.
- BTM晶体的极性结构克服了传统探测器的局限性.
- 嵌入式偏振场和强大的晶体结构的协同效应使便携式辐射检测的突破性性能成为可能.
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