Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Comparative study of the pulse shape discrimination (PSD) performance of pixelated stilbene and plastic scintillator (EJ-276) arrays for a coded-aperture-based hand-held dual-particle imager

  • Jihwan Boo (Department of Nuclear Engineering, Seoul National University) ;
  • Manhee Jeong (Department of Nuclear and Energy Engineering, Jeju National University)
  • Received : 2022.07.17
  • Accepted : 2023.01.15
  • Published : 2023.05.25
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Abstract

As the demand for the detection of special nuclear materials (SNMs) increases, the use of imaging instruments that can sensitively image both gamma-ray and neutron signatures has become necessary. This study compared the pulse shape discrimination (PSD) performance of gamma/neutron events when employing either a pixelated stilbene or a plastic (EJ-276) scintillator array coupled to a silicon photomultiplier (SiPM) array in a dual-particle imager. The stilbene array allowed a lower energy threshold above which neutron and gamma-ray events can be clearly distinguished. A greater number of events can, therefore, be used when forming both gamma-ray and neutron images, which shortens the time required to acquire the images by nearly seven times.

Keywords

Acknowledgement

This research was supported by the 2022 scientific promotion program funded by Jeju National University, South Korea.

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