A5078379192- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Nuclear reactor physics and engineering
- Laser-Plasma Interactions and Diagnostics
- High-pressure geophysics and materials
- Fusion materials and technologies
- Radioactivity and Radon Measurements
- Atomic and Subatomic Physics Research
Japan Atomic Energy Agency
2022-2024
Experiments identify the mechanism that accelerates ions in a laser-driven neutron source (LDNS) as well scaling law for yield, key insights move LDNS closer to practical generation.
In short-distance time-of-flight measurements, the background events increase exponentially with decreasing distance. Furthermore, large number of increases uncertainty measured data. The moderated neutron beam includes time-dependent originating from moderator, such as 2.2 MeV gamma rays emitted by 1H (n,γ) reaction in moderator. this study, to develop a compact resonance transmission analysis system high accuracy, we studied relationship between moderator and based on rays. Monte Carlo...
Compact time-of-flight (TOF) measurement systems are desirable for easy installation in various facilities. To achieve such compact systems, one of the key considerations is design neutron moderator. Therefore, systematic studies on moderators considering both energy resolution and intensity important. In this paper, to an epithermal moderator at ambient temperature short-distance TOF measurements, neutrons have been studied using Monte Carlo simulation code PHITS with JENDL-4.0 types...
We propose neutron resonance fission analysis (NRFNA), an active nondestructive assay (NDA) technique, to improve the capability identify and quantify a small amount of fissile material in sample. NRFNA uses pulsed neutrons induce reactions Fission are detected by neutron-gamma pulse shape discrimination (PSD) scintillation detector with time-of-flight (TOF) technique. The obtained nuclide-specific peaks energy spectrum provide information possibility using PSD for was confirmed through test...
<title>Abstract</title> Laser-driven neutron sources (LDNSs) can generate strong short-pulse beams, which are valuable for scientific studies and engineering applications. Neutron resonance transmission analysis (NRTA) is a nondestructive assay method determining the areal density of each nuclide in material sample using pulsed thermal epithermal neutrons. An experiment demonstrating resonance-transition-spectrum measurement was conducted an LDNS driven by Laser Fast Ignition Experiment at...
Laser-driven neutron sources (LDNSs) can generate strong short-pulse beams, which are valuable for scientific studies and engineering applications. Neutron resonance transmission analysis (NRTA) is a nondestructive technique used determining the areal density of each nuclide in material sample using pulsed thermal epithermal neutrons. Herein, we report first successful NRTA performed an LDNS driven by Laser Fast Ignition Experiment at Institute Engineering, Osaka University. The key...