Wang Dongming, Ruskov Ivan N, Hu Huasi, Kopatch Yuri N, Grozdanov Dimitar N, Fedorov Nikita A, Aliyev Fuad A
School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China.
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Moscow, Russian Federation.
Rev Sci Instrum. 2019 Jan;90(1):015107. doi: 10.1063/1.5050211.
In this article, we present a new industrial gamma-ray imaging system. This system takes advantage of a time-modulated random coded aperture (TMRCA). The gamma-ray detector coupled to the TMRCA can be position-sensitive or non-position-sensitive. The TMRCA imaging system could offer the ability to identify radioactive sources without losing spatial resolution. With a non-position-sensitive BGO detector, a prototype TMRCA imaging system was constructed. The prototype system was investigated with two gamma-ray sources (Cs, Co) and a Pu-Be neutron source, which was placed in a paraffin moderator to produce an extended source. The experimental results suggest that the TMRCA imaging system offers the opportunity to achieve high spatial-energy resolution cost-effectively for high-energy gamma rays.
在本文中，我们介绍了一种新型工业伽马射线成像系统。该系统利用了时间调制随机编码孔径（TMRCA）。与TMRCA耦合的伽马射线探测器可以是位置敏感型或非位置敏感型。TMRCA成像系统能够在不损失空间分辨率的情况下识别放射性源。利用非位置敏感型BGO探测器构建了一个TMRCA成像系统原型。使用两个伽马射线源（铯、钴）和一个钚-铍中子源对该原型系统进行了研究，钚-铍中子源置于石蜡慢化剂中以产生扩展源。实验结果表明，TMRCA成像系统为高能伽马射线以经济高效的方式实现高空间能量分辨率提供了机会。
