A5005913520- Nuclear physics research studies
- Nuclear Physics and Applications
- Computational Geometry and Mesh Generation
- Cellular Automata and Applications
- Quantum Chromodynamics and Particle Interactions
- Nuclear reactor physics and engineering
- Advanced Graph Theory Research
- Diamond and Carbon-based Materials Research
- Graph Labeling and Dimension Problems
- Complexity and Algorithms in Graphs
- Digital Image Processing Techniques
- Particle physics theoretical and experimental studies
- semigroups and automata theory
- Advanced NMR Techniques and Applications
- Computability, Logic, AI Algorithms
- DNA and Biological Computing
- Astronomical and nuclear sciences
- Atomic and Molecular Physics
- Particle accelerators and beam dynamics
- Radiation Detection and Scintillator Technologies
- graph theory and CDMA systems
- Neutrino Physics Research
- Semiconductor materials and devices
- Advanced Welding Techniques Analysis
- Atomic and Subatomic Physics Research
Hiroshima University
2016-2025
The University of Tokyo
2002-2024
Osaka University
2011-2024
Tottori University
2024
RIKEN Center for Advanced Photonics
2021-2023
RIKEN
2018-2022
Joint Institute for Nuclear Astrophysics
2021
RIKEN Nishina Center
2020
Kyushu University
1993-2020
Ibaraki University
2015-2020
We describe a group of alloys that exhibit "super" properties, such as ultralow elastic modulus, ultrahigh strength, super elasticity, and plasticity, at room temperature show Elinvar Invar behavior. These properties are attributable to dislocation-free plastic deformation mechanism. In cold-worked alloys, this mechanism forms strain fields hierarchical structure range in size from the nanometer scale several tens micrometers. The resultant energy leads number enhanced material properties.
The electric dipole strength distribution in 120Sn between 5 and 22 MeV has been determined at RCNP Osaka from a polarization transfer analysis of proton inelastic scattering E_0 = 295 forward angles including 0{\deg}. Combined with photoabsorption data an polarizability \alpha_D(120Sn) 8.93(36) fm^3 is extracted. as isovector observable par excellence carries direct information on the nuclear symmetry energy its density dependence. correlation new value well established \alpha_D(208Pb)...
Pure tetragonal phase ZrO2 (t-ZrO2) nanoparticles of sizes smaller than 5 nm were synthesized by a pulsed plasma in liquid (PPL) method, one-step synthesis method: an ammonia solution with no use dopants or annealing for stabilization. Lattice parameters the obtained samples refined Rietveld method revealed structural differences compared other methods such as sol–gel method. The intrinsic properties and alkaline environment (OH–) may be responsible stabilization zirconia, while oxygen...
Photoneutron cross sections were measured for ${}^{94}$Mo, ${}^{95}$Mo, ${}^{96}$Mo, ${}^{97}$Mo, ${}^{98}$Mo, and ${}^{100}$Mo near the neutron threshold with quasi-monochromatic laser-Compton scattering $\ensuremath{\gamma}$ rays. The photoneutron data analyzed Skyrme Hartree-Fock-Bogoliubov (HFB) plus quasiparticle random phase approximation (QRPA) model axially symmetric-deformed Gogny HFB QRPA of $E1$ $\ensuremath{\gamma}$-ray strength. Combining strength function constrained by present...
The electric dipole strength in 120Sn has been extracted from proton inelastic scattering experiments at E_p = 295 MeV and forward angles including 0 degree. Below neutron threshoild it differs the results of a 120Sn(gamma,gamma') experiment peaks an excitation energy 8.3 MeV. total corresponds to 2.3(2)% energy-weighted sum rule is more than three times larger what observed with (gamma,gamma') reaction. This implies strong fragmentation E1 and/or small ground state branching ratios excited...
γ emission probabilities from unbound states in 78,80Se, populated by a neutron-transfer reaction (d,p) on 77,79Se nuclei inverse kinematics, were measured directly detecting residues. Assuming the spin distribution at respective excitation energy of state, cross-sections 79Se(n,γ)80Se evaluated using probabilities. The surrogate-ratio method with experimental 78,80Se was also employed to deduce 79Se(n,γ) incorporating theoretical evaluations neutron-capture isomeric state 77Se. Our two are...
A high-resolution measurement of inelastic proton scattering off $^{90}\mathrm{Zr}$ near 0\ifmmode^\circ\else\textdegree\fi{} was performed at 295 MeV with a focus on pronounced strength previously reported in the low-energy tail giant dipole resonance. forest fine structure observed excitation energy region 7--12 MeV. multipole decomposition analysis angular distribution for carried out using ECIS95 distorted-wave Born approximation code Hartree-Fock plus random-phase model $E1$ and $M1$...
Gamow-Teller (GT) strength distributions have been investigated in a high-resolution (${}^{3}$He,$t$) charge-exchange experiment on the double-$\ensuremath{\beta}$ ($\ensuremath{\beta}\ensuremath{\beta}$ ) decaying nuclei ${}^{128}$Te and ${}^{130}$Te. The was carried out at Research Center for Nuclear Physics, Osaka, with 420-MeV incident ${}^{3}$He beam Grand Raiden magnetic spectrometer. A final-state energy resolution of 35 keV achieved. extracted GT low excitation energies final...
We conducted the coincidence measurement of $\alpha$ particles inelastically scattered from ${}^{20}$Ne at $0^{\circ}$ and decay charged in order to search for alpha-particle condensed state. compared measured excitation-energy spectrum branching ratio with statistical-decay-model calculations, found that newly observed states $E_x$ = 23.6, 21.8, 21.2 MeV are strongly coupled a candidate 4$\alpha$ state ${}^{16}$O. This result presents first strong evidence these candidates 5$\alpha$
Photoneutron cross sections were measured for ${}^{118}$Sn, ${}^{119}$Sn, ${}^{120}$Sn, ${}^{122}$Sn, and ${}^{124}$Sn near neutron threshold with quasi-monochromatic laser-Compton scattering $\ensuremath{\gamma}$ rays. A systematic analysis of the present photoneutron data existing neutron-capture is made using $\ensuremath{\gamma}$-ray strength function on basis HFB + QRPA model $E1$ supplemented a pygmy dipole resonance, which was deduced from previous study ${}^{116}$Sn ${}^{117}$Sn....
CoC(x) nanoparticles encapsulated in carbon shells were synthesized using a pulsed plasma liquid ethanol. This is the first time that monolithic cubic phase cobalt carbide have been obtained. X-ray diffraction refinement of showed lattice parameter prepared larger than (44-0962) and Co (15-0806 01-1259). The x-ray absorption fine structure spectra near K-edge sample indicated differences from commercial metallic oxide samples. High resolution transmission electron microscopy revealed thin...
Background: There is renewed interest in electric dipole strength distributions for a variety of reasons including the extraction polarizability related to properties symmetry energy and measure neutron skin thickness, understanding structure low-energy $E1$ nuclei with excess, establishing systematics isovector giant resonance (IVGDR). Inelastic proton scattering at energies few hundred MeV very forward angles ${0}^{\ensuremath{\circ}}$ has been established as tool study magnetic...
Using quasimonochromatic laser-Compton scattering $\ensuremath{\gamma}$ rays, total photoneutron cross sections were measured for ${}^{206,\phantom{\rule{0.16em}{0ex}}207,\phantom{\rule{0.16em}{0ex}}208}$Pb near neutron threshold with a high-efficiency 4$\ensuremath{\pi}$ detector. Partial $E1$ and $M1$ along determined ${}^{207,\phantom{\rule{0.16em}{0ex}}208}$Pb at four energies by measuring anisotropies in emission linearly polarized rays. The strength dominates over the channel where...
High temperature phase tungsten carbide and titanium coated with graphitic carbon (WC1−x@C TiC@C) nanoparticles were synthesized by pulsed plasma in liquid. HRTEM results show that the average size of WC1−x@C TiC@C are 30 35 nm, respectively. Raman spectroscopy revealed well-organized coatings, which make stable at higher temperatures resistant to oxidation. Refinement XRD profiles showed larger cell parameters compared JCPDS cards. Furthermore, thermogravimetric analyses thermal stability...
The change in the configuration of valence protons between initial and final states neutrinoless double-$\ensuremath{\beta}$ decay $^{130}\text{Te}\ensuremath{\rightarrow}^{130}\text{Xe}$ $^{136}\text{Xe}\ensuremath{\rightarrow}^{136}\text{Ba}$ has been determined by measuring cross sections $(d,^{3}\text{He})$ reaction with 101-MeV deuterons. Together our recent determination relevant neutron configurations involved process, a quantitative comparison latest shell-model...
"Background-free" spectra of inelastic α-particle scattering have been measured at a beam energy 385 MeV in 90,92Zr and 92Mo extremely forward angles, including 0°. The ISGMR strength distributions for the three nuclei coincide with each other, establishing clearly that nuclear incompressibility is not influenced by shell structure near A∼90 as was claimed recent measurements.
Sublattice reversal in III-V compound semiconductors grown on group-IV epitaxial layers substrates has been proposed for fabricating nonlinear optical devices with domain-inverted semiconductor structures. epitaxy is demonstrated the GaAs/Si/GaAs (100) system and confirmed by reflection high energy electron diffraction, cross-sectional transmission microscopy, anisotropic etching, second-harmonic generation measurements. The present sublattice seems to be assisted self annihilation of...
A new beta titanium alloy group which exhibits multi functions, such as, ultra-low elastic modulus, ultra-high strength, huge elasticity, clayey plasticity at room temperature without work hardening, Elinvar and Invar properties, has been developed. These ''super'' properties are attributable to an arcane feature in relation plastic deformation of the alloy; they result from a dislocation-free mechanism. In cold-worked alloy, this mechanism forms strain fields with hierarchical structure...
The synthesis of wurtzite-type ZnS nanoparticles by an electric discharge submerged in molten sulfur is reported. Using a pulsed plasma between two zinc electrodes diameter 5 mm sulfur, we have synthesized high-temperature phase (wurtzite-type) nanocrystals with average size about 20 nm. refined lattice parameters the were found to be larger than those reported (JCPDS card no 36-1450). Synthesis ZnMgS (solid solution and MgS) was achieved using ZnMg alloys as both cathode anode electrodes....