Performance of digital algorithms for n//spl gamma/ pulse shape discrimination using a liquid scintillation detector

Sellin, P.J.; Jaffar, G.; Jastaniah, S.D.

doi:10.1109/nssmic.2003.1351874

Cited by 7 publications

(6 citation statements)

References 7 publications

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“…Therefore, a Q-ratio assessment is a suitable approach for performing PSD of these particle types. Typically, a Q-ratio assessment is performed as a peak-to-tail comparison, whereas this work uses the ratio between a partial and total integration of the waveform [4]. The start of the integration is defined as 𝑡 0 , the partial integration ends at 𝑡 1 and the total at 𝑡 2 :…”

Section: Jinst 18 P01020mentioning

confidence: 99%

Studies in pulse shape discrimination for an optimized ASIC design

Boxer¹,

Godfrey²,

Grace³

et al. 2023

J. Inst.

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The continued advancements of Silicon Photomultipliers (SiPMs) have made them viable photosensors for low recoil energy Pulse Shape Discrimination (PSD) between fast neutron and gamma interactions when coupled to an appropriate scintillator. At the same time, the large number of channels in a typical array calls for the development of low-cost and low-power electronics. A custom integrated circuit (ASIC) is an ideal solution for this purpose. To assess the requirements for such an ASIC, studies were performed using two scintillators, Stilbene and EJ-276, coupled to a 6 × 6 mm SiPM from Onsemi. We demonstrate that both scintillators are viable for performing PSD for interaction energies from 100 keV to several MeV while optimizing the integration periods used in the PSD metric. These measurements inform the design parameters of the ASIC under development.

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Section: Jinst 18 P01020mentioning

confidence: 99%

Studies in pulse shape discrimination for an optimized ASIC design

Boxer¹,

Godfrey²,

Grace³

et al. 2023

J. Inst.

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“…The TOT method has been investigated for applications such as Time-of-Flight-PET [15,16], PSD in phoswich detectors [17], neutron/gamma-ray discrimination in organic liquid and solid scintillators [18,19] and PSD in 4 He gas scintillation counters [20]. As the relationship between TOT and pulse amplitude or charge is strongly non-linear, several authors proposed various methods for obtaining a linear TOT-charge relationship, such as dynamic time-over-threshold (DToT) [21,22], time-over-linear-threshold (TOLT) [23], and multiple-thresholds (MToT) [19,24,30].…”

Section: • Limited Dynamic Rangementioning

confidence: 99%

Evaluation of the Constant Fraction Time-Over-Threshold (CF-TOT) method for neutron-gamma pulse shape discrimination

Roy,

Vartsky,

Mor

et al. 2021

Preprint

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A: The use of Time-over-Threshold (TOT) for the discrimination between fast neutrons and gamma-rays is advantageous when large number of detection channels are required due to the simplicity of its implementation. However, the results obtained using TOT are usually inferior to those obtained using other pulse shape discrimination (PSD) methods. We present a novel approach for fast neutron/gamma-ray PSD using Constant-Fraction Time-over-Threshold (CF-TOT) pulse shape analysis. The method was evaluated using digitized waveforms from a liquid scintillator coupled to a photomultiplier tube as well as from a stilbene scintillator coupled to a photomultiplier tube and a silicon photomultiplier. The quality of neutron/gamma-ray discrimination was evaluated using Receiver Operator Characteristics curves and the results obtained with this approach were compared to the standard Constant Threshold Time-over-Threshold (CT-TOT) method. The novel CF-TOT PSD method results in >99.7% rejection of gamma-rays with ∼80% neutron acceptance, significantly better than CT-TOT.

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“…Therefore, complicated data analysis that are not accessible in analogue systems can be acquired. For example, S. D. Jastaniah et al [3] used the digital pulse rise time to achieve good n/γ discrimination in boron loaded liquid scintillator. In 2014, Abdullah Al-Shbatat [4] used different numerical methods like trapezoidal, Simpson's, and rectangular integration methods pulse integration and used its value for the discrimination.…”

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

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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.

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Performance of digital algorithms for n//spl gamma/ pulse shape discrimination using a liquid scintillation detector

Cited by 7 publications

References 7 publications

Studies in pulse shape discrimination for an optimized ASIC design

Studies in pulse shape discrimination for an optimized ASIC design

Evaluation of the Constant Fraction Time-Over-Threshold (CF-TOT) method for neutron-gamma pulse shape discrimination

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

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