Neutron–gamma discrimination based on quantum clustering technique

Lotfi, Y.; Moussavi-Zarandi, S.A.; Ghal-Eh, Nima; Pourjafarabadi, Esmaiel; Bayat, E.

doi:10.1016/j.nima.2019.03.009

Cited by 11 publications

(4 citation statements)

References 19 publications

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“…Inorganic scintillators, such as NaI and Lu 1.8 Y 0.2 SiO 5 :Ce (LYSO:Ce), are generally used for γ-ray detection because of their high density and high light yield. , However, they lack sensitivity for fast neutron detection because of their low interaction cross section. Plastic and liquid scintillators, such as EJ200 and BC501, have high detection efficiency to fast neutrons as they are rich in hydrogen atoms. , However, these scintillators hardly respond to γ-rays due to their low effective atomic number ( Z eff ) and low light yield. In this regard, high-efficiency detection of neutrons and γ-rays using a single scintillator could decrease the required number of detectors as well as reduce the measurement errors arising due to using different scintillators.…”

Section: Introductionmentioning

confidence: 99%

“…Plastic and liquid scintillators, such as EJ200 and BC501, have high detection efficiency to fast neutrons as they are rich in hydrogen atoms. 8,9 However, these scintillators hardly respond to γ-rays due to their low effective atomic number (Z eff ) and low light yield. In this regard, highefficiency detection of neutrons and γ-rays using a single scintillator could decrease the required number of detectors as well as reduce the measurement errors arising due to using different scintillators.…”

Section: ■ Introductionmentioning

confidence: 99%

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Organic–Inorganic Hybrid Perovskite Scintillator for Neutron and γ-Ray Detection

Yan,

Duan,

et al. 2023

ACS Appl. Opt. Mater.

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For mixed-field radiation detection, abundant characteristic signatures can be obtained through the detection of both neutron and γ-rays, which brings a huge challenge for high-efficiency detection of neutrons and γ-rays by using a single scintillator. Unfortunately, commercial organic scintillators show good performance for neutron detection but lack the sensitivity to detect γ-rays, whereas inorganic scintillators show the opposite behavior. Herein, two-dimensional lithium-doped phenylethylammonium lead bromide (Li-(PEA)2PbBr4) perovskite single crystals were reported for mixed-field radiation detection. Abundant hydrogen, lithium, and heavy lead atoms enabled a large cross section toward neutrons and γ-rays. The Li-(PEA)2PbBr4 exhibited a bright blue emission peak at 434 nm, a fast decay time of 10.5 ns, a high light yield of ∼29 000 photons/MeV, and a light yield nearly 9 times higher than that of the plastic scintillator EJ200 under α excitation. The sensitivity was 2.55 × 10–14C per γ-ray under 60Co excitation. It also showed an excellent response toward neutrons with a wide range of energy, and the sensitivities were 2.29 × 10–14C per neutron (14.1 MeV) and 1.93 × 10–14C per neutron (2.5 MeV). Moreover, Li-(PEA)2PbBr4 exhibited better spatial resolutions in high-energy pulsed X-ray (2 lp/mm) and neutron (1 lp/mm) imaging applications. These results indicate the favorable ability of Li-(PEA)2PbBr4 in mixed-field radiation detection.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Organic–Inorganic Hybrid Perovskite Scintillator for Neutron and γ-Ray Detection

Yan,

Duan,

et al. 2023

ACS Appl. Opt. Mater.

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“…Energy spectrometer is an instrument used for laboratory and field detection, which is widely utilized to digitize various energy spectrum experiments related to nuclear physics [1]. Because gamma ray excitation is frequently present in neutron sources, it is particularly important to discriminate neutron and gamma rays in nuclear physics measurements quickly and effectively [2][3][4][5]. In recent years, there has been an increase in demand for precise and instantaneous portable spectrometers due to nuclear leakage incidents [6].…”

Section: Introductionmentioning

confidence: 99%

Handheld portable neutron gamma discrimination spectrometer for environmental detection

Zhang

et al. 2022

J. Inst.

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A compact and integrated neutron-gamma discrimination spectrometer that could be utilized for personal dosimetry and emergency response is urgently required. In this study, based on a CLYC scintillator coupled to silicon photomultiplier(SiPM) arrays, we designed a stand-alone, hand-held neutron-gamma discrimination spectrometer. After the analog-to-digital converter (ADC) digitizes the analog signal from the detector, the data is transmitted to a FPGA processor for online real-time processing, and then transmitted to a microcontroller through the serial peripheral interface(SPI) protocol, and the current detection result is displayed in real-time on the touch screen. By using the pulse signal discrimination(PSD) method, the spectrometer can simultaneously measure the spectrum of neutron and gamma events, with a resolution of 8.8% (at 1274.5 keV) and excellent linearity. The figure of merit (FOM) is 2.32 with optimized PSD parameters. The experimental results show that the spectrometer integrates the upper computer and detector, with real-time performance, portability and excellent neutron-gamma resolution. Online operation is realized through the touch screen, which greatly facilitates the real-time detection of radiation in the field environment.

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“…As a result, it is not straightforward to combine several analog systems and obtain a hybrid PSD feature. On the other hand, digital signal processing (DSP), mostly based on the advances of modern digitizers, have received attention for PSD applications, in both offline and real-time uses [2][3][4][5][6][7][8][9][10]. Such designs could be considered as the digital counterpart of an analog system, however, with the flexibilities that one can achieve from replacing an electronic system with a computer program.…”

Section: Introductionmentioning

confidence: 99%

Hybrid method for digital pulse shape discrimination in organic scintillation detectors

2019

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A: Digital signal processing (DSP) simplifies the implementation of pulse shape discrimination (PSD) methods in a cost-effective manner, no matter how complicated they are complicated. This paper deals with the development of a new concept in DSP for PSD, meaning to combine several basis PSD features and obtain a hybrid factor, deeming to inherit benefits of its basis methods. In this regard, we will consider the neutron-gamma discrimination problem, by appropriately combining different PSD methods, namely the Charge Integration Method (CIM), the Zero-Crossing Method (ZCM) and the so-called Simplified Charge Collection Method (SCCM) among several possibilities. It is revealed that the hybrid method should be fed by independent basis PSD factors, keeping in mind that different PSD methods might not be truly uncorrelated. Here, the proposed hybrid PSD factors (via combining CIM-ZCM-SCCM) were implemented. A quantitative analysis of the results, shows that this hybridization concept is generally able to improve the discrimination quality, increasing the FoM over the studied dynamic range. The proposed hybrid formula is simply based on a multiplication of individual PSD factors, but one may define more complex hybrid features in this framework, aiming to improve existing PSD methods by combining them.

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Neutron–gamma discrimination based on quantum clustering technique

Cited by 11 publications

References 19 publications

Organic–Inorganic Hybrid Perovskite Scintillator for Neutron and γ-Ray Detection

Organic–Inorganic Hybrid Perovskite Scintillator for Neutron and γ-Ray Detection

Handheld portable neutron gamma discrimination spectrometer for environmental detection

Hybrid method for digital pulse shape discrimination in organic scintillation detectors

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