在热中子检测中对CLYC-6和3He进行比较
Francesca Ferrulli1, Marco Silari1, Gabriele Zorloni1
1CERN, Geneva 1211, Switzerland.
与3He计数器相比,6丰富的化 (CLYC-6) 晶体显示出优越的热中子检测效率. 在中等条件下,这两种探测器都表现出类似的马射线排斥能力.
科学领域:
- 核仪器仪表 核仪器仪表 核仪器仪表
- 材料科学 材料科学 材料科学
背景情况:
- 开发高效可靠的热中子探测器对于各种应用至关重要.
- 3He气体探测器一直是标准的,但面临供应限制.
- 和化的酸闪器提供了潜在的替代品.
研究的目的:
- 为了研究-6丰富的Cs2LiYCl6:Ce (CLYC-6) 晶体用于热中子检测的性能.
- 为了比较其内在效率和马射线分辨能力与标准的3He计数器.
- 在不同的马射线背景条件下评估探测器性能.
主要方法:
- CLYC-6晶体和3He计数器 (2.3 atm) 的表征.
- 通过热中子辐射确定内在中子检测效率.
- 使用混合中子/137Cs辐射场对玛射线歧视的评估.
主要成果:
- CLYC-6显示了每单位体积的内在效率大约是3He计数器的6.45倍.
- 这两种探测器都有效地拒绝了高达10^5cm^-2·s^-1.1的流率的马射线.
- 在更高的马射线流动率 (~10^6 cm^-2·s^-1) 时,CLYC-6会经历死亡时间损失,而3He计数器则显示堆积效应.
结论:
- CLYC-6提供了显著更高的体积热中子检测效率.
- 在中度背景辐射下,CLYC-6和3He探测器都保持了可比的马射线排斥.
- 在这两种探测器类型的高马射线强度下,性能下降,限制了可靠性.
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