A5043796432- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Radioactive contamination and transfer
- Nuclear Materials and Properties
- Radioactivity and Radon Measurements
- Radioactive element chemistry and processing
- Nuclear physics research studies
- Radiation Detection and Scintillator Technologies
- Nuclear and radioactivity studies
- Graphite, nuclear technology, radiation studies
- Atomic and Molecular Physics
- Particle accelerators and beam dynamics
- Isotope Analysis in Ecology
- X-ray Spectroscopy and Fluorescence Analysis
- Chemical Synthesis and Characterization
- Advanced NMR Techniques and Applications
- Radiation Effects in Electronics
- Boron Compounds in Chemistry
- Geology and Paleoclimatology Research
- Atomic and Subatomic Physics Research
- Ion-surface interactions and analysis
- Radiation Therapy and Dosimetry
- Radiopharmaceutical Chemistry and Applications
- Rare-earth and actinide compounds
- Radioactive Decay and Measurement Techniques
Kyoto University
2015-2025
Japan Atomic Energy Agency
2010-2024
Tokyo Institute of Technology
2023
Kyoto University of Education
2023
University of Jeddah
2023
Kyoto University Research Reactor Institute
2007-2018
Osaka University
1996-1999
The neutron neutron-capture cross cross-sections of 244Cm and 246Cm were measured by the time-of-flight method in energy range 1–300 300 eV with an array large germanium detectors Accurate Neutron-Nucleus Reaction measurement InstrumentANNRI at Material Life Science Experimental Facility (MLF) Japan Proton Accelerator Research ComplexJ-PARC/MLF. resonances around 7.7 16.8 8 4.3 15.3 3 observed capture reactions for first time. uncertainties obtained are 5.8% top resonance 6.6% that 246Cm....
Cesium was recovered from plant samples obtained Fukushima prefecture. The isotopic ratios of 134Cs/137Cs and 135Cs/137Cs were analyzed by thermal ionization mass spectrometry with a single filament method using TaO activator. Samples containing 5 Bq 137Cs typical analytical errors approximately 0.5% for 0.1% 135Cs/137Cs. Measurements both showed profiles that characteristic the measurements among other environmental reported in literature. results applicable source analysis radioactive Cs
Gold nanoparticles (AuNPs) have recently attracted considerable attention as promising drug carriers. In vivo imaging of AuNPs is required to investigate their pharmacokinetics. However, a direct and highly sensitive method has not yet been established. Therefore, we proposed the activation that radioactivates non-invasively visualizes them using emitted gamma rays. When stable isotope gold, 197Au, irradiated with low-energy neutrons, it changes radioactive 198Au, which predominantly emits...
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Cesium was recovered from soil samples obtained in Fukushima prefecture. Isotopic analysis of Cs performed by γ-spectrometry to determine the activity ratio 134Cs/137Cs and thermal ionization mass spectrometry used isotopic ratios 133Cs/137Cs 135Cs/137Cs. The analytical results showed that both 135Cs/137Cs were within expected values for Daiichi Nuclear Power Plant estimated using ORIGEN-II code, suggesting most radioactive sample originated Plant. concentration 137Cs contribution global...
Neutron total and capture cross sections of 241Am have been measured with a new data acquisition system neutron transmission measurement installed in Accurate Nucleus Reaction Instrument at Materials Life Science Experimental Facility Japan Proton Accelerator Research Complex. The were determined by using time-of-flight (TOF) method the energy region from 4 meV to 2 eV. thermal section was derived an uncertainty 2.9%. A pulse-height weighting technique applied determine yields 241Am. TOF 100...
The prompt fission $\ensuremath{\gamma}$-ray energy spectrum for cold-neutron-induced of $^{235}\mathrm{U}$ was measured in the range ${E}_{\ensuremath{\gamma}}=0.8--20\phantom{\rule{0.28em}{0ex}}\mathrm{MeV}$, by gaining a factor about ${10}^{5}$ statistics compared to measurements performed so far. exhibits local bump structures at ${E}_{\ensuremath{\gamma}}\ensuremath{\approx}4\phantom{\rule{0.28em}{0ex}}\mathrm{MeV}$ and $\ensuremath{\approx}6\phantom{\rule{0.28em}{0ex}}\mathrm{MeV}$,...
To search for a direct-decay signal from the isomer $^{229}\mathrm{Th}$${}^{m}$, $\ensuremath{\alpha}$-particle spectra of $^{229}\mathrm{Th}$${}^{m,g}$ produced 93 mg $^{233}\mathrm{U}$ have been measured by using rapid and high-resolution spectrometry, which can distinguish $\ensuremath{\alpha}$ lines $^{229}\mathrm{Th}$${}^{m}$ those its ground state. Although events were not obtained in expected energy region with exception derived $^{229}\mathrm{Th}$${}^{g}$, we estimate that half-life...
Instead of conventional Ge semiconductor detectors and NaI(Tl) scintillation spectrometers, an application a CdZnTe (CZT) whose crystal has the dimension 1 cm cubic to in situ environmental radioactivity measurement was attempted deeply affected areas Fukushima region. Results deposition density on soil for 134Cs/137Cs obtained seemed consistent, comparing results with those measured by Japanese government.
Fission product kinetic energies were measured by the double-energy method for thermal-neutron fission of 235,233U and proton-induced 238U at 15.8-MeV excitation. From obtained energy-mass correlation data, kinetic-energy distribution was constructed from each mass bin to evaluate first moment energy a given fragment mass. The resulting then converted effective distance between charge centers scission. distances deduced concluded be classified into two constant values, one asymmetric other...