Measurement of positron annihilation lifetimes for positron burst by multi-detector array
Measurement of positron annihilation lifetimes for positron burst by multi-detector array
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DOI：
10.1016/j.nima.2017.12.048
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发表时间：
2018-03
影响因子：
1.4
通讯作者：
Baoyi Wang;Kuang Peng;Fuyan Liu;Han Zhenjie;Xingzhong Cao;P. Zhang
中科院分区：
文献类型：
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作者：
Baoyi Wang;Kuang Peng;Fuyan Liu;Han Zhenjie;Xingzhong Cao;P. Zhang
目前，不可能利用的时间信息，在纳秒内产生的伽马射线脉冲时，高强度的正电子爆发湮灭事件发生在一个目标使用传统的单探测器的方法。本文提出了一个国家的最先进的解决方案的问题。在这种方法中，由许多独立的检测单元组成的多检测器阵列安装在目标周围的球体被设计成检测以下产生的湮灭伽马射线的时间分布，特别是，在短脉冲持续时间内，甚至小于几纳秒或皮秒的正电子爆发发射大量的正电子。
It is currently impossible to exploit the timing information in a gamma-ray pulse generated within nanoseconds when a high-intensity positron burst annihilation event occurs in a target using conventional single-detector methods. A state-of-the-art solution to the problem is proposed in this paper. In this approach, a multi-detector array composed of many independent detection cells mounted spherically around the target is designed to detect the time distribution of the annihilated gamma rays generated following, in particular, a positron burst emitting huge amounts of positrons in a short pulse duration, even less than a few nano- or picoseconds.