基于离子导电的多晶氧化物马射线检测 - 辐射-离子效应
Thomas Defferriere1, Ahmed Sami Helal2,3, Ju Li1,2
1Department of Material Science and Engineering, MIT, Cambridge, MA, 02139, USA.
Advanced materials (Deerfield Beach, Fla.)
|February 21, 2024
概括
在陶中新发现的辐射离子效应使敏感的马射线检测成为可能. 这种金属氧化物功能陶的突破为低功率,微型化的固态辐射探测器提供了机会.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 陶工程 陶工程 陶工程
背景情况:
- 金属氧化物中的光离子效应提供了新的功能陶应用.
- 以前,在紫外线 (UV) 照射下,在薄膜中观察到光离子效应.
- 将这一点推广到用于辐射检测的散装材料上是一个新的前沿.
研究的目的:
- 研究和将光离子效应概括为用于散装陶材料中的玛射线检测的辐射离子效应.
- 为了证明轻度杂的加多杂氧化物 (Gd杂CeO2) 在辐射检测应用中的潜力.
主要方法:
- 使用轻度合的Gd合的CeO2,一种多晶离子导体陶.
- 将陶暴露在室温附近的60Co马射线 (1.1和1.3 MeV) 辐射中.
- 在低电场 (<2 V cm-1) 下测量了电阻比变化和离子电流响应.
主要成果:
- 观察到一个显著的阻力比率变化大约为10^3.3.
- 在暴露于玛射线辐射时,在离子电流中表现出可逆反应.
- 将这种效应归因于颗粒边界上的空间电荷屏障的被动化,调节离子载体流量.
结论:
- 大量陶中的电离辐射效应使敏感的马射线检测成为可能.
- 这种现象允许开发廉价,灵敏,低功耗和微型化的固态设备.
- 潜在的应用包括用于地热钻井的辐射探测器,小型模块化反应堆,核安全和废物管理,特别是在恶劣的环境中.
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