A5057598114- Muon and positron interactions and applications
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Atomic and Molecular Physics
- Particle Detector Development and Performance
- Photonic and Optical Devices
- Semiconductor Quantum Structures and Devices
- Semiconductor Lasers and Optical Devices
- Plant tissue culture and regeneration
- Particle physics theoretical and experimental studies
- Atomic and Subatomic Physics Research
- Advanced NMR Techniques and Applications
- Nuclear Physics and Applications
- Neutrino Physics Research
- Plasma Diagnostics and Applications
- Plant Molecular Biology Research
- Graphene research and applications
- Semiconductor materials and devices
- Particle Accelerators and Free-Electron Lasers
- Ammonia Synthesis and Nitrogen Reduction
- X-ray Spectroscopy and Fluorescence Analysis
- Plant Parasitism and Resistance
- Fusion materials and technologies
- Optical Network Technologies
- Radiation Detection and Scintillator Technologies
High Energy Accelerator Research Organization
2016-2025
Japan Proton Accelerator Research Complex
2014-2024
Toyo University
2011-2024
The Graduate University for Advanced Studies, SOKENDAI
2015-2023
Japan Atomic Energy Agency
2010-2023
Advanced Science Research Center
2023
Institute of Materials Structure Science
2006-2021
Kyoto University
1988-2019
Guangdong Technion-Israel Institute of Technology
2019
University of Wollongong
2019
This paper introduces a new approach to measure the muon magnetic moment anomaly |$a_{\mu} = (g-2)/2$| and electric dipole (EDM) |$d_{\mu}$| at J-PARC facility. The goal of our experiment is |$a_{\mu}$| using an independent method with factor 10 lower momentum, 20 smaller diameter storage-ring solenoid compared previous ongoing |$g-2$| experiments unprecedented quality storage field. Additional significant differences from present experimental include 1000 transverse emittance beam...
Background: A muonic atom, composed of a negative muon and an atomic nucleus, undergoes two primary decay processes: muon-electron nuclear capture. The branching ratio between these processes can be determined from the measured lifetime atom. While past researches have examined general trend capture rates across different nuclei, experimental theoretical investigations into isotope dependence remain limited. Purpose: present study aims to measure lifetimes atom isotopically enriched silicon...
The electronic structure and the location of muonium centers (Mu) in single-crystalline ZnO were determined for first time. Two species Mu with extremely small hyperfine parameters have been observed below 40 K. Both an axial-symmetric along a $⟨0001⟩$ axis, indicating that they are located at antibonding (${\mathrm{A}\mathrm{B}}_{\mathrm{O},\ensuremath{\parallel}}$) bond-center (${\mathrm{B}\mathrm{C}}_{\ensuremath{\parallel}}$) sites. It is inferred from their ionization energy...
Establishment of an effective supplementary lighting procedure is necessary to increase the value leaf lettuce grown using a hydroponic method involving low production cost. In extracts, quercetin, one flavonoids, was isolated and identified. It investigated that quercetin has important functions can be used as dietary supplement. Flavonol synthase (FLS) key enzyme involved in biosynthesis, catalyzes conversion dihydroquercetin quercetin. Therefore, we determined sequence flavonol gene red...
Emission of muonium (|$\mu ^+e^-$|) atoms from a laser-processed aerogel surface into vacuum was studied for the first time. Laser ablation used to create hole-like regions with diameter about 270 |$\mu $|m in triangular pattern hole separation range 300–500 $|m. The emission probability sample is at least eight times higher than uniform one.
A muon experimental facility, known as the Muon Science Establishment (MUSE), is one of user facilities at Japan Proton Accelerator Research Complex, along with those for neutrons, hadrons, and neutrinos. The MUSE facility integrated into Materials Life Facility building in which a high-energy proton beam that shared neutron experiment delivers variety beams research covering diverse scientific fields. In this review, we present current status MUSE, still process being developed its fully...
A hydrogen-like atom consisting of a positive muon and an electron is known as muonium. It near-ideal two-body system for precision test bound-state theory fundamental symmetries. The MuSEUM collaboration performed new measurement the muonium ground-state hyperfine structure at J-PARC using high-intensity pulsed beam high-rate capable positron counter. resonance transition was successfully observed near-zero magnetic field, interval $ν_{\text{HFS}}$ = 4.463302(4) GHz obtained with relative...
The x-ray spectroscopy of the muonic atom has attracted atomic, nuclear, and particle physicists since its discovery. properties a atom, such as binding energy or atomic radius, are different from an ordinary because difference in mass between muon electron. Our collaboration employed superconductor transition-edge sensor (TES) microcalorimeters for atom. Thanks to recent detector development, 44-keV lines Ar, which is important precision test bound-state quantum electrodynamics, 76-keV Si,...
At the J-PARC Muon Science Facility (MUSE), MuSEUM collaboration is now performing new precision measurements of ground state hyperfine structure (HFS) both muonium and muonic helium atoms. High-precision ground-state HFS are recognized as one most sensitive tools for testing bound-state quantum electrodynamics theory to precisely probe standard model determine fundamental constants positive muon magnetic moment mass. The same technique can also be employed measure HFS, obtain negative mass,...
Muonic helium is a hydrogenlike atom composed of with one its two electrons replaced by negative muon. Its ground-state hyperfine structure sensitive tool for testing the theory three-body atomic systems and bound-state quantum electrodynamics determining fundamental constants muon magnetic moment mass. New precise measurements are now in progress at J-PARC Muon Science Facility (MUSE). Zero-field have already been carried out, results more than previous 40 years ago. High-field preparation....
Thermal muonium (positive muon ${\ensuremath{\mu}}^{+}$ and electron ${e}^{\ensuremath{-}}$) atoms were produced from the surface of a hot (2300 K) high purity tungsten foil placed at primary beam 500 MeV pulsed protons. Resonant ionization $\left(1s\ensuremath{\rightarrow}2p\ensuremath{\rightarrow}\mathrm{unbound}\right)$ thermal with laser sources was achieved reference to hydrogen isotopes (D T) so as produce potentially intense ultraslow (as low 0.2 eV) positive an extremely narrow...
Elemental analysis of materials is fundamentally important to science and technology. Many elemental methods have been developed, but three-dimensional nondestructive bulk has remained elusive. Recently, our project team, dreamX (damageless regioselective with muonic X-rays), developed a depth-profiling method after decade research. This new utilizes type probe; negative muon particle high-energy X-rays emitted the stops in material. We performed depth profiling on an old Japanese gold coin...
Plants produce strigolactones (SLs) in roots response to nitrogen or phosphate deficiency. To evaluate SL levels under other mineral deficiencies rice, we cultivated rice seedlings hydroponic media without nitrogen, phosphorus, potassium, sulfur, calcium, magnesium, and iron. Tiller bud outgrowth was stimulated calcium deficiency because of low levels. increased sulfur deficiency, addition phosphate, deficiencies. explore which genes are key regulators production analyzed the expression...
Strigolactones (SLs) are a class of plant hormones that synthesized from β-carotene through sequential reactions catalyzed by DWARF (D) 27, D17, D10, and OsMORE AXILLARY GROWTH (MAX) 1 in rice (Oryza sativa L.). In rice, endogenous SL levels increase response to deficiency nitrogen, phosphate, or sulfate (-N, -P, -S). Rice mutants show increased lamina joint (LJ) angle as well dwarfism, delayed leaf senescence, enhanced shoot branching. The LJ is an important trait determines architecture....
As a new method to determine the resonance frequency, Rabi-oscillation spectroscopy has been developed. In contrast conventional which draws curve, fits time evolution of Rabi oscillation. By selecting optimized it is shown that precision twice as good with frequency sweep. Furthermore, data under different conditions can be treated in unified manner, allowing more efficient measurements for systems consisting limited number short-lived particles produced by accelerators such muons. We have...