A5076855882- Organic and Molecular Conductors Research
- Physics of Superconductivity and Magnetism
- Magnetism in coordination complexes
- Advanced Condensed Matter Physics
- Solid State Laser Technologies
- Crystal Structures and Properties
- Particle physics theoretical and experimental studies
- Magnetic and transport properties of perovskites and related materials
- Photonic and Optical Devices
- Photorefractive and Nonlinear Optics
- Semiconductor Lasers and Optical Devices
- Rare-earth and actinide compounds
- Quantum and electron transport phenomena
- High-Energy Particle Collisions Research
- Solid-state spectroscopy and crystallography
- Quantum Chromodynamics and Particle Interactions
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Magnetic properties of thin films
- Semiconductor Quantum Structures and Devices
- GaN-based semiconductor devices and materials
- Iron-based superconductors research
- High-pressure geophysics and materials
- Perovskite Materials and Applications
- Optical Network Technologies
- Neutrino Physics Research
Tohoku University
2015-2024
Institute for Materials Research, Tohoku University
2006-2023
Hokkaido University
1992-2023
The University of Tokyo
1971-2023
Sendai University
2020
International Medical Research (Germany)
2019
Sasaki Institute
2019
Geosyntec Consultants (United States)
2013-2017
Sophia University
2015-2017
Advanced Institute of Materials Science
2017
The gamman-->K(+)K(-)n reaction on 12C has been studied by measuring both K+ and K- at forward angles. A sharp baryon resonance peak was observed 1.54+/-0.01 GeV/c(2) with a width smaller than 25 MeV/c(2) Gaussian significance of 4.6sigma. strangeness quantum number (S) the is +1. It can be interpreted as molecular meson-baryon or alternatively an exotic five-quark state (uuddsmacr;) that decays into neutron. consistent lowest member antidecuplet baryons predicted chiral soliton model.
We present a combined analysis of fully-contained, partially-contained and upward-going muon atmospheric neutrino data from 1489 d exposure the Super-Kamiokande detector. The samples span roughly five decades in energy, 100 MeV to 10 TeV. A detailed Monte Carlo comparison is described presented. fit expectation, found be consistent with oscillations ${\ensuremath{\nu}}_{\ensuremath{\mu}}\ensuremath{\leftrightarrow}{\ensuremath{\nu}}_{\ensuremath{\tau}}$ ${sin}^{2}2\ensuremath{\theta}>0.92$...
Muon neutrino disappearance probability as a function of flight length L over energy E was studied. A dip in the L/E distribution observed data, predicted from sinusoidal flavor transition oscillation. The constrained nu_mu <-> nu_tau oscillation parameters; 1.9x10^-3 < Delta m^2 3.0x10^-3 eV^2 and \sin^2(2theta) > 0.90 at 90% confidence level.
The Belle detector at the KEKB electron-positron collider has collected almost 1 billion Y(4S) events in its decade of operation. Super-KEKB, an upgrade is under construction, to increase luminosity by two orders magnitude during a three-year shutdown, with ultimate goal 8E35 /cm^2 /s luminosity. To exploit increased luminosity, been proposed. A new international collaboration Belle-II, being formed. Technical Design Report presents physics motivation, basic methods accelerator upgrade, as...
The details of Super-Kamiokande-I’s solar neutrino analysis are given. Solar measurement in Super-Kamiokande is a high statistics collection 8B neutrinos via neutrino-electron scattering. method and results the 1496 day data sample presented. final oscillation for presented also.50 MoreReceived 30 August 2005DOI:https://doi.org/10.1103/PhysRevD.73.112001©2006 American Physical Society
The results of the second phase Super-Kamiokande solar neutrino measurement are presented and compared to first phase. flux spectrum time variation as well oscillation statistically consistent with do not show spectral distortion. time-dependent combined phases coincides full period cycle 23 shows no correlation activity. measured $^{8}\mathrm{B}$ total is...
The nanometer-size crystallization of poly(3,4-ethylenedioxythiophene) (PEDOT) inside the hydrophobic core region PEDOT:PSS (PSS: poly(4-styrenesulfonate)) in a solid film is found by small and wide-angle X-ray scatterings using synchrotron radiation source. clarified structure indicates that nanocrystal PEDOT surrounded PSS grown from randomly oriented micelle dispersed water during course fabrication. addition ethylene glycol (EG) to dispersion post-treatment pristine with EG both provide...
We present the results of indirect searches for Weakly Interacting Massive Particles (WIMPs), with 1679.6 live days data from Super-Kamiokande detector using neutrino-induced upward through-going muons. The search is performed by looking an excess high energy muon neutrinos WIMP annihilations in Sun, core Earth, and Galactic Center, as compared to number expected atmospheric neutrino background. No statistically significant was seen. calculate flux limits various angular cones around each...
InGaN single-crystal films were grown on (0001) plane sapphire substrates at 800 °C by metalorganic vapor phase epitaxy. By using such a high temperature for growth, the crystalline quality has been greatly improved. But nitrogen over pressure and indium source flow rate necessary to achieve significant incorporation during growth. For first time, photoluminescence observed in InGaN, near-band edge emission is seen 77 K. From this photoluminescence, dependence of mole fraction investigated.
To clarify the superconducting gap structure of spin-triplet superconductor Sr2RuO4, in-plane thermal conductivity has been measured as a function relative orientations flow, crystal axes, and magnetic field rotating within 2D RuO2 planes. The variation is incompatible with any model line nodes vertical to planes indicates existence horizontal nodes. These results place strong constraints on models that attempt explain mechanism triplet superconductivity.
The thermal conductivity of organic superconductor kappa-(BEDT-TTF)2Cu(NCS)2 (Tc = 10.4 K) has been studied in a magnetic field rotating within the 2D superconducting planes with high alignment precision. At low temperatures ( T < or 0.5 K), clear fourfold symmetry angular variation, which is characteristic d-wave gap nodes along directions rotated 45 degrees relative to b and c axes crystal, was resolved. determined nodal structure inconsistent recent theoretical predictions...
Mn-doped GaN films on sapphire (0001) substrates were grown by molecular beam epitaxy system using ammonia as nitrogen source. The result of magnetization measurement gives Curie temperature high 940 K. field and dependencies the show coexistence ferromagnetic paramagnetic phases. In addition, electrical resistance carrier concentration measured to investigate relation between ferromagnetism transport property. Below about 10 K, a similar anomalous increase is observed.
Single-crystal gallium nitride was grown on each of the two polar {0001} planes 6H-silicon carbide substrates utilizing metal-organic vapor-phase epitaxy. The substrate polarity is clearly shown to strongly influence surface morphology and photoluminescence property layer. examination layer surfaces using x-ray photoelectron spectroscopy revealed that GaN basal SiC changes its in accordance with polarity.
A series of experiments focused on high neutron yield has been performed with the Gekko-XII green laser system [Nucl. Fusion 27, 19 (1987)]. Deuterium–tritium (DT) 1013 and pellet gain 0.2% have achieved. Based experimental data from more than 70 irradiations, scaling laws related physical quantities studied. Comparison that obtained by using a one-dimensional fluid code led to conclusion most neutrons produced in stagnation phase computation are not observed experiment because fuel–pusher...
We have measured and analyzed the dielectric constant of dimer Mott insulator $\ensuremath{\kappa}\text{\ensuremath{-}}{(\text{BEDT-TTF})}_{2}{\text{Cu}}_{2}{(\text{CN})}_{3}$, which is known as a playground for spin-liquid state. Most unexpectedly, this particular organic salt has nontrivial charge degrees freedom, being characterized by relaxor-like relaxation below around 60 K. This ascribed to disproportionation within due intersite Coulomb repulsion. A possible microscopic model...
To investigate the efficacy and safety of nitroglycerin plus vinorelbine cisplatin in patients with previously untreated stage IIIB/IV non-small-cell lung cancer (NSCLC) as experimental arm for next phase III trial.One hundred twenty NSCLC were randomly assigned to 25 mg/m2 on days 1 8 80 day 1, transdermally applied (25 mg/patient daily 5 days; A) or placebo patch (arm B) every 3 weeks a maximum four cycles double-blind controlled trial. Primary end points best confirmed response rate time...
Differential cross sections and photon beam asymmetries for the gamma p rightarrow K+ Lambda Sigma0 reactions have been measured in energy range from 1.5 GeV to 2.4 angular Theta_{cm} = 0 60 of scattering angle center mass system at SPring-8/LEPS facility. The both found be positive increase with energy. differential agree data by CLAS collaboration cosTheta_{cm}<0.9 within experimental uncertainties, but discrepancy SAPHIR K+Lambda reaction is large cosTheta_{cm}>0.9. In reaction,...
We report on the results of a three-flavor oscillation analysis using Super-Kamiokande I atmospheric neutrino data, with assumption one mass scale dominance ($\ensuremath{\Delta}{m}_{12}^{2}=0$). No significant flux change due to matter effect, which occurs when neutrinos propagate inside Earth for ${\ensuremath{\theta}}_{13}\ensuremath{\ne}0$, has been seen either in multi-GeV ${\ensuremath{\nu}}_{e}$-rich sample or ${\ensuremath{\nu}}_{\ensuremath{\mu}}$-rich sample. Both normal and...
The result of a search for neutrino bursts from supernova explosions using the Super-Kamiokande detector is reported. sensitive to core-collapse via observation their emissions. expected number events comprising such burst ~10^4 and average energy neutrinos in few tens MeV range case explosion at typical distance our galaxy (10 kiloparsecs); this large signal means that detection efficiency anywhere within well past Magellanic Clouds 100%. We examined data set which was taken May, 1996 July,...
A search for neutron-antineutron ($n\ensuremath{-}\overline{n}$) oscillation was undertaken in Super-Kamiokande using the 1489 live-day or $2.45\ifmmode\times\else\texttimes\fi{}{10}^{34}$ neutron-year exposure data. This process violates both baryon and minus lepton numbers by an absolute value of two units is predicted a large class hypothetical models where seesaw mechanism incorporated to explain observed tiny neutrino masses matter-antimatter asymmetry Universe. No evidence...