Gamma-ray tracking for high energy gamma-ray imaging in pixelated CdZnTe

Shy, Daniel; He, Zhong

doi:10.1016/j.nima.2018.10.121

Title: Gamma-ray tracking for high energy gamma-ray imaging in pixelated CdZnTe

Journal Article · Mon Oct 01 00:00:00 EDT 2018 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2018.10.121· OSTI ID:1524440

Shy, Daniel ^[1]; He, Zhong ^[1]

Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Nuclear Engineering and Radiological Sciences

Sequencing gamma-ray interactions within a detector system is an integral component of Compton imaging. In detectors with poor timing resolution compared to the time interval of successive interactions, algorithms which order gamma-ray interactions must be implemented using only energy and position information. This work examines previous algorithms and inspects interaction kinematics to increase the sequencing algorithm’s speed and effectiveness. The proposed method, in which the first interaction is assumed to deposit the largest energy, has improved sequencing performance by greater than 20% for full energy gamma ray depositions larger than 1 MeV that do not contain pair-production. In addition, the algorithm shows a decrease in computational costs for sequence reconstruction to allow for better real time reconstruction. Experimental results show an almost twofold increase in the signal to noise ratio (SNR) for simple backprojection images of a ²²Na source. Additional measurements of the 2.2 MeV gamma rays from H¹(n,$$\gamma$$)D² neutron capture demonstrates the proposed algorithm’s superior performance.

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Research Organization:: Univ. of Michigan, Ann Arbor, MI (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA), Office of Nonproliferation and Verification Research and Development (NA-22); USDOE

Grant/Contract Number:: NA0002534; NA002131

OSTI ID:: 1524440

Alternate ID(s):: OSTI ID: 1636281

Journal Information:: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 954; ISSN 0168-9002

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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Imaging Special Nuclear Material using a Handheld Dual Particle Imager Steinberger, William M.; Ruch, Marc L.; Giha, Nathan Scientific Reports, Vol. 10, Issue 1 https://doi.org/10.1038/s41598-020-58857-z	journal	February 2020
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Gamma-ray tracking
Compton event reconstruction
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Compton kinematics
High energy gamma-ray imaging

Title: Gamma-ray tracking for high energy gamma-ray imaging in pixelated CdZnTe

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