Lithium-Loaded Scintillators Coupled to a Custom-Designed Silicon Photomultiplier Array for Neutron and Gamma-Ray Detection

Liang, Felix; Brands, H.; Hoy, Les; Preston, Jeff; Smith, J.R.

doi:10.1109/tns.2018.2820658

Cited by 14 publications

(2 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the active constant temperature method inevitably increases the detector volume. There have been some studies to eliminate the temperature dependence by optimizing the bias voltage or pulse shape discrimination parameters [18,19]. However, most of the current studies used digitizers to store waveforms and optimize parameters through offline data processing, which is difficult to achieve miniaturization and ease of use.…”

Section: Jinst 17 T06005mentioning

confidence: 99%

A portable neutron gamma discrimination detector based on NaIL and SiPM

Zhang¹,

Wang²,

S.³

et al. 2022

J. Inst.

View full text Add to dashboard Cite

neutron-gamma detection technology is widely used in nuclear physics, high-energy physics, radiation medicine, and other fields. A NaIL scintillator coupled with a silicon photomultiplier (SiPM) can form a neutron-gamma detector with excellent discrimination, small size, and low cost. However, the performances of a NaIL scintillator and SiPM are affected by temperature, which leads to a shift in energy spectrum and deterioration in neutron-gamma discrimination. Most of the current studies have used digitizers to store data and analyze detector energy spectrum and waveform characteristics offline to eliminate temperature dependence. In this study, a small neutron-gamma detector was constructed using NaIL scintillators, SiPM, and circuits developed in the laboratory. Online calibration of the ARM processor eliminates the temperature dependence of the detector's energy spectrum and neutron-gamma discrimination. Automatic energy spectrum stabilization and good neutron-gamma discrimination were achieved in a wide temperature range. The test results show that the peak shift of the 137Cs 662 keV full-energy peak of the detector is reduced from 5.3% to 0.4% at 0–50°C. After the online correction of the temperature feedback PSD parameters, the figure of merit at 45°C is 40% higher than that before the correction, and the detector's figure of merit at 0–50°C is maintained above 3.4.

show abstract

Section: Jinst 17 T06005mentioning

confidence: 99%

A portable neutron gamma discrimination detector based on NaIL and SiPM

Zhang¹,

Wang²,

S.³

et al. 2022

J. Inst.

View full text Add to dashboard Cite

show abstract

“…Qiao et al [6] used the convolution neural networks to discriminate double Liang et al discus the effect of the temperature variation on the PSD result for a designed array of Silicon Photo-Multiplier (SiPM) coupled to Lithium-loaded scintillators. Results indicated that a poorer discrimination is obtained at high temperatures because of the thermal noise in SiPMs [7]. Yang et al investigated and compared four FPGA-based digital PSD methods.…”

Section: I In Nt Tr Ro Od Du Uc Ct Ti Io On Nmentioning

confidence: 99%

Efficient Discrimination of Neutron and Gamma Rays using Different Digital Pulse Processing Algorithms

Hammad

Kasban

Fikry

et al. 2020

Menoufia Journal of Electronic Engineering Research

View full text Add to dashboard Cite

In different neutron measurement experiments, it is necessary to apply pulse processing method to distinguish neutron pulses from gamma pulses. The discrimination process is based on the different decaying response of the detector for both neutron and gamma events. Different proposed algorithms are presented in this paper for determining the radiation type of detector output. In the proposed algorithms, features are extracted from the input radiation event. These features are extracted using charge integration, Hilbert transformation, and matched filtering methods. The extracted features are then fed the discriminator which is an Artificial Neural Network (ANN) or Support Vector Machine (SVM) discriminators. The obtained results prove that, the proposed approaches can be used efficiently for the neutron and gamma discrimination purpose and that method based on the Hilbert transformation achieves the highest discrimination rates.

show abstract