Calibration of EJ-276 plastic scintillator for neutron–gamma pulse shape discrimination experiments

Ryabeva, E. V.; Urupa, I.V.; Lupar, E. E.; Kadilin, V. V.; Skotnikova, A.V.; Kokorev, Y.A.; Ibragimov, R.F.

doi:10.1016/j.nima.2021.165495

Cited by 20 publications

(9 citation statements)

References 14 publications

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“…To establish the light-output function of the EJ-276 plastic scintillators in the FINAC system, the time-of-flight (TOF) of neutrons was coincidently measured for reference gamma-ray signals. The resultant light-output function showed reasonable agreement with one established from previous research based on the Exponential model [16,17]. Experimentally applied light-output thresholds for an EJ-276 scintillation detector were reconsidered as proton-energy thresholds in Monte Carlo simulations.…”

Section: Introductionsupporting

confidence: 74%

“…To cleanly separate neutroninduced signals from gamma-rays in one of our experiments, we applied a light-output threshold of 250 keVee. The corresponding proton energy for this threshold is approximately 1.6 MeV, according to Cecil's exponential model [16,17]. Considering that the average neutron energy from spontaneously fissionable nuclides is around 2 MeV, this threshold is relatively high.…”

Section: Introductionmentioning

confidence: 98%

“…HCPs such as protons and alpha particles require higher energy to generate the same light output as electrons [16,17]. When Compton electrons with energies of 1, 2, and 3 MeV are generated by gamma-ray interactions and deposit their energy in an organic scintillator, distinct peaks are observed in the light output spectrum.…”

Section: Introductionmentioning

confidence: 99%

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Comparative investigation of detector responses and measurement uncertainties in fast-neutron coincidence counting for nuclear material accountancy

Yoon,

Lee,

Seo

et al. 2023

Meas. Sci. Technol.

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Fast-neutron measurement with organic scintillators has been considered one of the alternative techniques to thermal neutron measurement based on He-3 proportional counters, due to their economic and measurement-uncertainty potential for nuclear material accountancy (NMA). Nevertheless, highly suppressed neutron detection efficiencies and nuclide-dependent features indicated in the fast system as well as the utilization of pulse-shape discrimination (PSD) which necessitates a significant energy threshold could lead to challenges in terms of characterizing nuclear material samples. This work confirmed a reasonable similarity of simulated results to experimental results concerning the non-linear light-output function of proton recoils. Consequently, nuclide-dependent detector responses and measurement uncertainty were investigated with varying diverse measurement parameters (the number of detectors, measurement time, and sample quantity). Also, comparative studies were conducted for the ACP Safeguards Neutron Counter (ASNC), a developed thermal system, and the Fission Informative Neutron-based ACcounting (FINAC), the proposed fast system currently under development by KAERI, for passive non-destructive assay (NDA) of special nuclear materials.

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Section: Introductionsupporting

confidence: 74%

Section: Introductionmentioning

confidence: 98%

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Comparative investigation of detector responses and measurement uncertainties in fast-neutron coincidence counting for nuclear material accountancy

Yoon,

Lee,

Seo

et al. 2023

Meas. Sci. Technol.

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“…There are particular constraints on shape of pulse signals in nuclear signal processing, such as the desire for a flat signal top to enable the extraction of pulse amplitude for more analysis [10]. One of most effective approaches for that is the pulse shape discrimination method (PSD) [11]. The PSD can be utilized for differentiating between BGO and LSO scintillation pulses.…”

Section: Introductionmentioning

confidence: 99%

“…This property makes PSD ideal for homeland security and safeguards applications [13]. The PSD has become widely employed for particle separation as a result of the transition from analogue to digital electronics, as evidenced by a significant number of research [11]. The conventional PSD approaches rely on gated charge integration (CI) of observed pulses to obtain high classification accuracy [13].…”

Section: Introductionmentioning

confidence: 99%

An efficient digital pulse processing approach for identification of BGO and LSO scintillator crystals

Tokhy

2023

J. Inst.

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Identification and discrimination between BGO and LSO scintillators is a fundamental target for handling parallax error within positron emission tomography (PET) applications by depth of interaction. An approach is built for discrimination and identification of BGO and LSO scintillator crystals. This approach is tested using a simulated BGO and LSO pulses. A Matlab Simulink model is implemented for simulation and creation of BGO and LSO scintillation pulses. The simulated pulses depend on 22Na radiation source. The suggested approach has two different algorithms. The first algorithm uses both 1D-Walsh ordered fast Walsh-Hadamard transform (1WFWHT) and fast Chebyshev transform (FCHT) for extracting the features of crystal pulses. The optimum features are selected from 1WFWHT and FCHT using one of three optimization techniques that are binary dragonfly optimization (BDA), binary atom search optimization (BASO) and binary Harris Hawk optimization (BHHO). These optimized features are trained and tested using one of three based classifiers. These classifiers are Naive Bayes classifier (NBC), hierarchical prototype-based (HP) classifier and adaptive neuro-fuzzy inference system (ANFIS) classification. The ANFIS classifier achieves the best accuracy with all optimum (BASO, BDF and BHH) FCHT features. However, the NB classifier introduces the highest accuracy with all optimum (BASO, BDF and BHH) FWHT 1D features. The second algorithm uses the conventional neural network (CNN) for extracting the pulse features. Then, the deep neural network (DNN) is applied for training and testing of the captured pulses. The suggested algorithms are verified and compared in respect of statistical measures. The compared results confirm that the best accuracy and identification rate is accomplished using DNN algorithm. Besides, the DNN has better results compared to conventional classification techniques with optimum feature selection techniques in respect of time consumption. The proposed approach aids in the realisation of overcoming parallax inaccuracy in PET.

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Stilbene-Based Spectrometer for Unfolding the Energy Distribution of Fast Neutron Sources

et al. 2022

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Calibration of EJ-276 plastic scintillator for neutron–gamma pulse shape discrimination experiments

Cited by 20 publications

References 14 publications

Comparative investigation of detector responses and measurement uncertainties in fast-neutron coincidence counting for nuclear material accountancy

Comparative investigation of detector responses and measurement uncertainties in fast-neutron coincidence counting for nuclear material accountancy

An efficient digital pulse processing approach for identification of BGO and LSO scintillator crystals

Stilbene-Based Spectrometer for Unfolding the Energy Distribution of Fast Neutron Sources

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