Pulse shape discrimination of Cs2LiYCl6:Ce3+ detectors at high count rate based on triangular and trapezoidal filters

Wen, Xianfei; Enqvist, Andreas

doi:10.1016/j.nima.2017.06.007

Title: Pulse shape discrimination of Cs₂LiYCl₆:Ce³⁺ detectors at high count rate based on triangular and trapezoidal filters

Journal Article · Fri Sep 01 00:00:00 EDT 2017 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2017.06.007· OSTI ID:1487073

Wen, Xianfei ^[1]; Enqvist, Andreas ^[1]

Univ. of Florida, Gainesville, FL (United States). Nuclear Engineering Program

Cs₂LiYCl₆:Ce³⁺ (CLYC) detectors have demonstrated the capability to simultaneously detect γ-rays and thermal and fast neutrons with medium energy resolution, reasonable detection efficiency, and substantially high pulse shape discrimination performance. In this work, a disadvantage of CLYC detectors is the long scintillation decay times, which causes pulse pile-up at moderate input count rate. Pulse processing algorithms were developed based on triangular and trapezoidal filters to discriminate between neutrons and γ-rays at high count rate. The algorithms were first tested using low-rate data. They exhibit a pulse-shape discrimination performance comparable to that of the charge comparison method, at low rate. Then, they were evaluated at high count rate. Neutrons and γ-rays were adequately identified with high throughput at rates of up to 375 kcps. The algorithm developed using the triangular filter exhibits discrimination capability marginally higher than that of the trapezoidal filter based algorithm irrespective of low or high rate. The algorithms exhibit low computational complexity and are executable on an FPGA in real-time. Finally, they are also suitable for application to other radiation detectors whose pulses are piled-up at high rate owing to long scintillation decay times.

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

Sponsoring Organization:: USDOE NA Office of Nonproliferation and Verification Research and Development (NA-22); US Department of Homeland Security (DHS)

Grant/Contract Number:: NA0002534; 2014-DN-077-ARI083

OSTI ID:: 1487073

Alternate ID(s):: OSTI ID: 1454785

Journal Information:: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 866; ISSN 0168-9002

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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References (19)

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