A5077109467- Nuclear Physics and Applications
- Nuclear physics research studies
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Planetary Science and Exploration
- Astro and Planetary Science
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Earthquake Detection and Analysis
- Atomic and Molecular Physics
- Dark Matter and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Astrophysics and Cosmic Phenomena
- X-ray Spectroscopy and Fluorescence Analysis
- Superconducting Materials and Applications
- Quantum, superfluid, helium dynamics
- Gas Sensing Nanomaterials and Sensors
- Particle accelerators and beam dynamics
- Spacecraft Design and Technology
- Advanced Chemical Physics Studies
- Electron and X-Ray Spectroscopy Techniques
- Neutrino Physics Research
- Particle Accelerators and Free-Electron Lasers
- Advanced Semiconductor Detectors and Materials
Gifu University
2023-2024
Chiba Institute of Technology
2013
Waseda University
2002-2009
Osaka City University
2008
Tohoku University
2005
The University of Tokyo
1994-2003
RIKEN
2003
Saitama University
2003
Muroran Institute of Technology
1991
Yamagata University
1989-1990
Hypernuclear mass spectra of ${\mathrm{}}_{\mathrm{\ensuremath{\Lambda}}}^{10}$B, ${\mathrm{}}_{\mathrm{\ensuremath{\Lambda}}}^{12}$C, ${\mathrm{}}_{\mathrm{\ensuremath{\Lambda}}}^{28}$Si, ${\mathrm{}}_{\mathrm{\ensuremath{\Lambda}}}^{89}$Y, ${\mathrm{}}_{\mathrm{\ensuremath{\Lambda}}}^{139}$La, and ${\mathrm{}}_{\mathrm{\ensuremath{\Lambda}}}^{208}$Pb were measured by the (${\mathrm{\ensuremath{\pi}}}^{+}$,${\mathit{K}}^{+}$) reaction with an energy resolution 2 MeV (FWHM). The experiment...
We have observed a clear peak below the ${\ensuremath{\Sigma}}^{+}$-production threshold in ${}^{4}\mathrm{He}({K}^{\ensuremath{-}},{\ensuremath{\pi}}^{\ensuremath{-}})$ reaction at $600\mathrm{MeV}/c$ and ${\ensuremath{\theta}}_{K\ensuremath{\pi}}{\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}4}^{\ensuremath{\circ}}$. This is confirmation of existence bound state ${}_{\ensuremath{\Sigma}}^{4}\mathrm{He}$, which was reported...
An experiment demonstrating the production of double-Lambda hypernuclei in (K(-),K(+)) reactions on (9)Be was carried out at D6 line BNL alternating-gradient synchrotron. The technique observation pions produced sequential mesonic weak decay, each pion associated with one unit strangeness change. results indicate a significant number double hypernucleus (4)(double Lambda)H and twin (4)(Lambda)H (3)(Lambda)H. relevant decay chains are discussed simple model mechanism is presented. implication...
A search for $\ensuremath{\Sigma}$ hypernuclear states in $p$-shell hypernuclei has been performed with the Moby Dick spectrometer and low energy separated beam (LESB-2) at Brookhaven Alternating Gradient Synchrotron (BNL AGS). Unlike some previously published reports, no narrow have observed targets of ${}^{6}\mathrm{Li}$ ${}^{9}\mathrm{Be}$ $({K}^{\ensuremath{-}},{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}})$ reactions, either bound state or continuum regions. Together reported...
The result of a measurement $\ensuremath{\sigma}({\ensuremath{\nu}}_{\ensuremath{\mu}}+{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\nu}}_{\ensuremath{\mu}}+{e}^{\ensuremath{-}})$ is presented. With use neutrinos mean energy 1.5 GeV from the Brookhaven National Laboratory alternating gradient synchrotron and massive, active, high-resolution detector, signal 51\ifmmode\pm\else\textpm\fi{}9 events with an average signal-to-background ratio greater than 2:1 observed....
A spectroscopic study of the $_{\ensuremath{\Lambda}}^{12}\mathrm{C}$ hypernucleus by (${\ensuremath{\pi}}^{+}, {K}^{+}$) reaction has been performed using a new superconducting kaon spectrometer (INS-SKS) at KEK 12 GeV Proton Synchrotron with an energy resolution 2 MeV (FWHM). In addition to two prominent peaks which correspond $s$ and $p$ orbitals $\ensuremath{\Lambda}$ hyperon, for first time smaller were clearly observed excitation energies 2.6 6.9 MeV. These are interpreted as states...
The ionization alpha , electron attachment eta and other transport coefficients for SF6 perfluorocyclobutane (c-C4F8) gas mixtures have been calculated by a three-term Boltzmann equation method over the E/N range 283-707 Td. A set of collision cross-sections that gives parameters in agreement with measurements pure gases is used. calculation performed important experimental conditions, i.e. steady-state Townsend (SST), pulsed (PT) time-of-flight (TOF) methods. It found greater reduction more...
This paper describes measurements of the semileptonic weak-neutral-current reactions $\ensuremath{\nu}_{\ensuremath{\mu}}p\ensuremath{\rightarrow}\ensuremath{\nu}_{\ensuremath{\mu}}p$ and $\overline{\ensuremath{\nu}}_{\ensuremath{\mu}}p\ensuremath{\rightarrow}\overline{\ensuremath{\nu}}_{\ensuremath{\mu}}p$ which yield absolute differential cross sections $\frac{d\ensuremath{\sigma}(\ensuremath{\nu}_{\ensuremath{\mu}}p)}{d{Q}^{2}}$...
Polarization of $\ensuremath{\Lambda}$ hyperons and differential cross sections for the reaction $\ensuremath{\gamma}+p\ensuremath{\rightarrow}{K}^{+}+\ensuremath{\Lambda}$ were measured at ${K}^{+}$-meson center-of-mass angles around 45\ifmmode^\circ\else\textdegree\fi{}, 70\ifmmode^\circ\else\textdegree\fi{}, 90\ifmmode^\circ\else\textdegree\fi{} incident photon energies 1054, 1100, 1160 MeV. The ${K}^{+}$ mesons detected with a magnetic spectrometer velocity-selection system based on...
Proton (H
We have measured the ${}^{8}\mathrm{Li}(\ensuremath{\alpha}{,n)}^{11}\mathrm{B}$ reaction directly and exclusively, determined total cross sections in center-of-mass energy of 1.5--7.0 MeV, by using a new-type gas counter, multiple-sampling tracking proportional chamber (MSTPC), neutron counters. This experiment was performed condition inverse kinematics. The ${}^{8}\mathrm{Li}$ beam produced RIKEN projectile-fragment separator, injected into MSTPC filled with ${}^{4}\mathrm{He}$ gas, which...
The high precision gamma-ray spectrometer (GRS) is carried on the first Japan's large-scaled lunar explorer, SELENE (KAGUYA), successfully launched by H-IIA rocket Sep. 14, 2007. GRS consists of a large Ge crystal as main detector and massive bismuth germanate crystals plastic scintillator anticoincidence detectors. After series initial health check GRS, it started regular observation December 21, Energy spectra including many clear peaks major elements trace surface have been measured GRS....