Gamma-ray imaging with a time-modulated random coded aperture

Dongming Wang; Ivan N Ruskov; Huasi Hu; Yuri N Kopatch; Dimitar N Grozdanov; Nikita A Fedorov; Fuad A Aliyev

doi:10.1063/1.5050211

Gamma-ray imaging with a time-modulated random coded aperture

Rev Sci Instrum. 2019 Jan;90(1):015107. doi: 10.1063/1.5050211.

Authors

Dongming Wang¹, Ivan N Ruskov², Huasi Hu¹, Yuri N Kopatch², Dimitar N Grozdanov², Nikita A Fedorov², Fuad A Aliyev²

Affiliations

¹ School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China.
² Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Moscow, Russian Federation.

PMID: 30709164
DOI: 10.1063/1.5050211

Abstract

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 (¹³⁷Cs, ⁶⁰Co) and a ²³⁸Pu-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.