A5076115211- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Nuclear physics research studies
- Atomic and Subatomic Physics Research
- Particle physics theoretical and experimental studies
- Nuclear Materials and Properties
- Radiation Therapy and Dosimetry
- Medical Imaging Techniques and Applications
- Dark Matter and Cosmic Phenomena
- Radiopharmaceutical Chemistry and Applications
- Radioactive contamination and transfer
- Astrophysics and Cosmic Phenomena
- Methane Hydrates and Related Phenomena
- Fusion materials and technologies
- Radioactivity and Radon Measurements
- Muon and positron interactions and applications
- Boron Compounds in Chemistry
- Superconducting Materials and Applications
- Advanced Materials Characterization Techniques
- Low-power high-performance VLSI design
- Advanced Chemical Physics Studies
- Graphite, nuclear technology, radiation studies
- Geophysical Methods and Applications
Japan Atomic Energy Agency
2006-2024
Kyushu University
2015-2024
Taisei (Japan)
2024
RIKEN
2023
High Energy Accelerator Research Organization
2023
Yamagata University
2023
Waseda University
2023
Nippon Soken (Japan)
2023
The Graduate University for Advanced Studies, SOKENDAI
2023
Nagoya University
2023
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....
A new system proposed for the generation of radioisotopes with accelerator neutrons by deuterons (GRAND) is described mainly discussing production 99Mo used nuclear medicine diagnosis. prototype facility this consists a cyclotron to produce intense from natC(\(d\),\(n\)) reaction 40 MeV 2 mA deuteron beams, and sublimation separate 99mTc an irradiated 100MoO3 sample. About 8.1 TBq/week produced repeating irradiation on enriched 100Mo sample (251 g) two days three times. It meets about 10%...
We have measured the activation cross sections producing 64Cu and 67Cu, promising medical radioisotopes for molecular imaging radioimmunotherapy, by bombarding a natural zinc sample with 14 MeV neutrons. estimated production yields of 67Cu fast neutrons from \text{natC(\(d\),\(n\)) 40 5 mA deuterons. used present result together evaluated section Zn isotopes. The calculated yield is 1.8 TBq (175 g 64Zn) 12 h irradiation; 67Zn(\(n\),\(p\))67Cu 68Zn(\(n\),\(x\))67Cu were 249 GBq (184 67Zn) 287...
The cross-section of the 237Np reaction has been measured in energy range from 10 meV to 1 keV using ANNRI-NaI(Tl) spectrometer at Japan Proton Accelerator Research Complex (J-PARC). was obtained relative that 10B reaction. absolute value deduced by normalizing evaluated JENDL-4.0 first resonance. thermal be ( ) b. Maxwellian-averaged for derived as b referring below JENDL-4.0. These results lead Westcott's g-factor .
A portable muography detector was developed for measuring infrastructure degradation and its performance tested. The consists of two muon position sensitive detectors (mu-PSDs) the area 140 mm × mm, placed in a compact light-shielding box. Each mu-PSD plastic scintillating fibers connected to multipixel photon counters (MPPCs). To suppress gain deviation MPPCs, box heat insulated inner air temperature maintained by Peltier cooling-heating modules. pixel size 8.75 distance between mu-PSDs set...
Irradiation experiments of positive and negative muon were conducted for 65-nm bulk CMOS static random-access memory. The experimental results reveal that parasitic bipolar action (PBA) contributes to muon-induced upsets. We observe an increase in single event upset (SEU) cross section at higher operation voltage under irradiation while shows opposite decreasing tendency. Also, the proportion multiple-cell (MCU) events all is up 66, more than a 20-bit MCU observed. Furthermore, Monte Carlo...
Spallation reactions for the long-lived fission product |$^{93}$|Zr have been studied in order to provide basic data necessary nuclear waste transmutation. Isotopic-production cross sections via proton- and deuteron-induced spallation on at 105 MeV/nucleon were measured inverse kinematics RIKEN Radioactive Isotope Beam Factory. Remarkable jumps isotopic production originating from neutron magic number |$N=50$| observed Zr Y isotopes. The experimental results compared PHITS calculations...
Abstract Meteorological-tsunami-like (or meteotsunami-like) periodic oscillation was muographically detected with the Tokyo-Bay Seafloor Hyper-Kilometric Submarine Deep Detector (TS-HKMSDD) deployed in underwater highway called Trans-Tokyo Bay Expressway or Tokyo Aqua-Line (TBAL). It right after arrival of 2021 Typhoon-16 that passed through region 400 km south bay. The measured period and decay time were respectively 3 h 10 h. These measurements found to be consistent previous tide gauge...
Abstract Tidal measurements are of great significance since they may provide us with essential data to apply towards protection coastal communities and sea traffic. Currently, tide gauge stations laser altimetry commonly used for these measurements. On the other hand, muography sensors can be located underneath seafloor inside an undersea tunnel where electric telecommunication infrastructures more readily available. In this work, world’s first under-seafloor particle detector array called...
Deuteron production from intermediate-energy proton-nucleus interactions was investigated through experiments and model calculations, mainly to develop a theoretical by elucidating the mechanism of cluster production. Spectral double-differential cross sections were measured for inclusive $(p,dx)$ reactions on five targets in periodic table, namely ${}^{12}$C, ${}^{27}\phantom{\rule{-0.16em}{0ex}}$Al, ${}^{51}\phantom{\rule{-0.16em}{0ex}}$V, ${}^{93}$Nb, ${}^{197}$Au, at beam energies 300...
We have performed an irradiation test of low-energy positive and negative muons on 65-nm ultra-thin body thin buried oxide silicon-on-insulator static random access memories. The single event upset (SEU) cross sections were measured systematically as a function incident muon momentum operating supply voltage. experimental results show that the SEUs occur at about three times higher rate than ones voltage 0.5 V when stop near sensitive volume (SV). A Monte-Carlo simulation with particle heavy...
Spallation reactions for the long-lived fission product 107Pd have been studied purpose of nuclear waste transmutation. The cross sections on proton- and deuteron-induced spallation were obtained at 196 118 MeV/nucleon in inverse kinematics RIKEN Radioactive Isotope Beam Factory. Both target energy dependences investigated systematically. It was found that proton-induced are close to those deuteron light-mass products. experimental data compared with SPACS semi-empirical parameterization...
We have for the first time succeeded in separating 99m Tc from a MoO 3 sample irradiated with accelerator neutrons free any radioactive impurities and formulating Tc-methylene diphosphonate ( Tc-MDP). 99 Mo, mother nuclide of Tc, was produced by 100 Mo( n ,2 ) Mo reaction using about 14 MeV provided H( d , 4 He at Fusion Neutronics Source Japan Atomic Energy Agency. The separated sublimation its radionuclide purity confirmed to be higher than 99.99% γ-spectroscopy. labeling efficiency Tc-MDP...
We investigate proton-production double-differential cross sections (DDXs) for 300- and 392-MeV proton-induced reactions on O, V, Tb, Ta, Au, Pb, Bi. Emitted proton energies are measured with stacked scintillator spectrometers by the $\ensuremath{\Delta}E\ensuremath{-}E$ technique. Experimental results compared intranuclear cascade (INC) quantum molecular dynamics models. Although both models can reproduce spectral DDXs, there is a difference at most forward backward angles. The cause of...
We have for the first time studied radionuclide purity of therapeutic isotope 67Cu produced by 68Zn(n,x)67Cu reaction. The neutrons were obtained natC(d,n) reaction using 40 MeV deuterons. measured γ-ray spectra products bombarding an enriched 68ZnO sample with a high-purity Ge detector. found that relative production yields impurity radionuclides 64Cu, 65Zn, and 69mZn to are extremely low. result indicates is most promising among those proposed routes until now producing high-quality 67Cu,...
Proton productions from proton induced reactions have been investigated for target nuclei of $^{12}\mathrm{C}$, $^{27}\mathrm{Al}$, and $^{93}\mathrm{Nb}$ at 300 392 MeV. inelastic continua over a broad energy range were measured laboratory angles ${20}^{\ifmmode^\circ\else\textdegree\fi{}}$ to ${105}^{\ifmmode^\circ\else\textdegree\fi{}}$. The differential cross sections compared with two theoretical models, the quantum molecular dynamics (QMD) intranuclear cascade (INC) model in terms...