A5019302356- Nuclear physics research studies
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Nuclear reactor physics and engineering
- Superconducting Materials and Applications
- Radiopharmaceutical Chemistry and Applications
- Silicon Carbide Semiconductor Technologies
- Particle accelerators and beam dynamics
- Neutrino Physics Research
- Medical Imaging and Pathology Studies
- High-pressure geophysics and materials
- Muon and positron interactions and applications
- Advancements in Semiconductor Devices and Circuit Design
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging and Analysis
- Semiconductor materials and devices
- Boron Compounds in Chemistry
- Radiation Effects in Electronics
- Atomic and Subatomic Physics Research
RIKEN Nishina Center
2016-2025
Kyoto University
2001-2024
Gifu University
2000
Many neutron star properties, such as the proton fraction, reflect symmetry energy contributions to equation of state that dominate when and densities differ strongly. To constrain these at suprasaturation densities, we measure spectra charged pions produced by colliding rare isotope tin (Sn) beams with isotopically enriched Sn targets. Using ratios pion measured high transverse momenta, deduce slope be $42<L<117\text{ }\text{ }\mathrm{MeV}$. This value is slightly lower but consistent $L$...
In the past two decades, pions created in high density regions of heavy ion collisions have been predicted to be sensitive at densities symmetry energy term nuclear equation state, a property that is key our understanding neutron stars. new experiment designed study energy, multiplicities negatively and positively charged measured with accuracy for central 132Sn+124Sn, 112Sn+124Sn, 108Sn+112Sn E/A=270 MeV SπRIT Time Projection Chamber. While individual pion are 4% accuracy, those...
The key parameter to discuss the possibility of pion condensation in nuclear matter, i.e., so-called Landau-Migdal g^{'}, was extracted by measuring double-differential cross sections for (p,n) reaction at 216 MeV/u on a neutron-rich doubly magic unstable nucleus, ^{132}Sn with quality comparable data taken stable nuclei. strengths Gamow-Teller (GT) transitions from leading ^{132}Sb exhibit GT giant resonance (GTR) excitation energy 16.3±0.4(stat)±0.4(syst) MeV width Γ=4.7±0.8 MeV....
Abstract We present the discovery of a new isotope 98Sn beyond double magic N = Z 50 nucleus 100Sn. was identified among projectile-fragmentation products 124Xe beam at 345 MeV/nucleon RI Beam Factory, RIKEN, Japan. Additionally, we have confirmed production 96In and 94Cd, previously reported as isotopes RIKEN. These highly proton-rich nuclei were separated using large-acceptance two-stage separator BigRIPS. Furthermore, determined cross sections its neighboring nuclei. experimental values...
Properties of the nuclear equation state (EoS) can be probed by measuring dynamical properties nucleus-nucleus collisions. In this study, we present directed flow (v1), elliptic (v2) and stopping (VarXZ) measured in fixed target Sn + collisions at with SπRIT Time Projection Chamber. We perform Bayesian analyses which EoS parameters are varied simultaneously within Improved Quantum Molecular Dynamics-Skyrme (ImQMD-Sky) transport code to obtain a multivariate correlated constraint. The include...
The Superconducting Analyzer for MUlti-particles from RAdioIsotope (SAMURAI) Pion-Reconstruction and Ion-Tracker Time Projection Chamber (SπRIT TPC) was designed to enable measurements of heavy ion collisions with the SAMURAI spectrometer at RIKEN radioactive isotope beam factory provides constraints on equation state neutron-rich nuclear matter. SπRIT TPC has a 50.5 cm drift length an 86.4 × 134.4 cm2 pad plane 12 096 pads that are equipped generic electronics TPCs. allows excellent...
Machine Learning (ML) algorithms have been demonstrated to be capable of predicting impact parameter in heavy-ion collisions from transport model simulation events with perfect detector response. We extend the scope ML application experimental data by incorporating realistic response S$\pi$RIT Time Projection Chamber into generated UrQMD resemble data. At 3 fm, predicted is 2.8 fm if used for training and testing; 2.4 included testing, 5.8 trained applied testing that has The last result not...
The charge-exchange (p,n) reaction at 220 MeV has been measured to extract the strength distribution of Gamow-Teller transitions from doubly magic unstable nucleus 132Sn. A recently developed experimental technique measuring in inverse kinematics applied study nuclei mass region around A∼100 for first time. We have combined low-energy neutron detector WINDS and SAMURAI spectrometer RIKEN radioactive isotope beam factory (RIBF). particle identification plot residues obtained by provides clear...
Properties of the nuclear equation state (EoS) can be probed by measuring dynamical properties nucleus-nucleus collisions. In this study, we present directed flow ($v_1$), elliptic ($v_2$) and stopping (VarXZ) measured in fixed target Sn + collisions at 270 AMeV with S$\pi$RIT Time Projection Chamber. We perform Bayesian analyses which EoS parameters are varied simultaneously within Improved Quantum Molecular Dynamics-Skyrme (ImQMD-Sky) transport code to obtain a multivariate correlated...
Significant improvement of channel mobility in SiC MOSFETs with high reliability and deep understanding bipolar degradation are presented. By excluding oxidation while adopting H2 etching prior to oxide formation interface nitridation, a low state density 6×10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">10</sup> cm xmlns:xlink="http://www.w3.org/1999/xlink">-2</sup> eV xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> near the conduction...