Commentary05 Feb 2024
Unbound 28O, the heaviest oxygen isotope observed: a cutting‑edge probe for testing nuclear models
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Research article27 Jan 2025
Comprehensive study of pulse shape discrimination in a Ga-doped zinc oxide scintillating detector
Doping with Ga effectively enhances the crystal quality and optical detection efficiency of zinc oxide (ZnO) single crystals, which has attracted considerable research interest in radiation detection. The application of ZnO:Ga (GZO in nuclear energy is particularly significant and fascinating at the fundamental level, enabling neutron/gamma discrimination while preserving the response time properties of the single crystal in sub-nanoseconds, maximizing the effective counting rate of the pulsed radiation field. In this study, the single-particle waveform discrimination characteristics of GZO were evaluated for five charged particles (α, β, H+,Li+, and O8+ and two prevalent uncharged particles (neutrons and gamma rays). Based on the time correlation single-photon counting (TCSPC) method, the luminescence decay time constants of the charged particles in the GZO crystal were determined as follows: 1.21 ns for H+, 1.50 ns for Li+, 1.70 ns for O8+, 1.56 ns for α particles, and 1.09 ns for β particles. Visible differences in the excitation time spectra curves were observed. Using the conventional time-domain or frequency-domain waveform discrimination techniques, waveform discrimination of 14.9 MeV neutrons and secondary gamma rays generated by the CPNG-6 device based on GZO scintillation was successfully implemented. The neutron signal constituted 77.93% of the total, indicating that GZO exhibited superior neutron/gamma discrimination sensitivity compared with that of a commercial stilbene crystal. Using the neutron/gamma screening outcomes, we reconstructed the voltage pulse height, charge height, and neutron multiplication time spectra of the pulsed neutron radiation field. The reconstructed neutron multiplication time spectrum exhibited a deviation of less than 3% relative to the result obtained using a commercial stilbene scintillator. This is the first report in the open literature on the neutron/gamma discrimination and reconstruction of ZnO pulsed radiation-field information.
Kuo Zhao, Liang Chen, Ning Lv, Lei-Dang Zhou, Shi-Yi He, Jin-Lu Ruan, Han Wang, Xiao-Ping Ouyang
Research article27 Jan 2025
Improvement and correction for transverse emittance diagnosis based on Q-scanning techniques
Precise transverse emittance assessment in electron beams is crucial for advancing high-brightness beam injectors. As opposed to intricate methodologies that use specialized devices, quadrupole focusing strength scanning (Q-scanning) techniques offer notable advantages for various injectors owing to their inherent convenience and cost-effectiveness. However, their stringent approximation conditions lead to inevitable errors in practical operation, thereby limiting their widespread application. This study addressed these challenges by revisiting the analytical derivation procedure and investigating the effects of the underlying approximation conditions. Preliminary corrections were explored through a combination of data processing analysis and numerical simulations. Furthermore, based on theoretical derivations, virtual measurements using beam dynamics calculations were employed to evaluate the correction reliability. Subsequent experimental validations were performed at the Huazhong University of Science and Technology injector to verify the effectiveness of the proposed compensation method. Both the virtual and experimental results confirm the feasibility and reliability of the enhanced Q-scanning-based diagnosis for transverse emittance in typical beam injectors operating under common conditions. Through the integration of these corrections and compensations, enhanced Q-scanning-based techniques emerge as promising alternatives to traditional emittance diagnosis methods.
Yi-Feng Zeng, Hao Hu, Tong-Ning Hu
Research article27 Jan 2025
A ROOT based detector geometry and event visualization system for JUNO-TAO
The Taishan Antineutrino Observatory(TAO or JUNO-TAO) is a satellite experiment of the Jiangmen Underground Neutrino Observatory(JUNO), located near the Taishan nuclear power plant(NPP). The TAO aims to measure the energy spectrum of reactor antineutrinos with unprecedented precision, which would benefit both reactor neutrino physics and the nuclear database. A detector geometry and event visualization system was developed for the TAO. The software was based on ROOT packages and embedded in the TAO offline software framework. This provided an intuitive tool for visualizing the detector geometry, tuning the reconstruction algorithm, understanding neutrino physics, and monitoring the operation of reactors at NPP. Further applications of the visualization system in the experimental operation of TAO and its future development are discussed.
Ming-Hua Liao, Kai-Xuan Huang, Yu-Mei Zhang, Jia-Yang Xu, Guo-Fu Cao, Zheng-Yun You
CURRENT ISSUE
Nuclear Science and TechniquesVol.36, No.3
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International Workshop on Nuclear Dynamics
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Invited Review Articles
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Speedy Nuclear Measurements for Cleaner Energy
Bromine's Neutron Capture and the s-Process
Nondestructive Neutron Techniques boosts Material Research and Preservation
Speedy Nuclear Measurements for Cleaner Energy
Advancing Particle Analysis with Intelligent Algorithms
Exploring Nuclear Energy with Lithium Reactions
Innovative Neutronics Modeling to Maximize Plutonium-238 Output
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Open Seminar in Frontier of Nuclear Physics
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