A5045963482- Muon and positron interactions and applications
- Particle Detector Development and Performance
- Particle accelerators and beam dynamics
- Quantum, superfluid, helium dynamics
- Atomic and Molecular Physics
- Superconducting Materials and Applications
- Particle physics theoretical and experimental studies
- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Neutrino Physics Research
- Cold Fusion and Nuclear Reactions
- Radiation Detection and Scintillator Technologies
- Advanced Chemical Physics Studies
- Spacecraft and Cryogenic Technologies
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced NMR Techniques and Applications
- Ammonia Synthesis and Nitrogen Reduction
- Nuclear physics research studies
- High-Energy Particle Collisions Research
- Rare-earth and actinide compounds
- Dark Matter and Cosmic Phenomena
- Magnetic confinement fusion research
- Fusion materials and technologies
- Methane Hydrates and Related Phenomena
- Particle Accelerators and Free-Electron Lasers
RIKEN Nishina Center
2008-2024
High Energy Accelerator Research Organization
2023-2024
Japan Proton Accelerator Research Complex
2024
Rutherford Appleton Laboratory
2023
RIKEN
1988-2017
RIKEN Advanced Science Institute
2005-2014
Niigata University
2014
University of Electro-Communications
2002
The University of Tokyo
1982-1996
Tokyo University of Science
1986-1996
Abstract The FAMU experiment aims to measure for the first time hyperfine splitting of muonic hydrogen ground state. From this measurement proton Zemach radius can be derived and will shed light on determination charge radius. In paper, we describe scientific goal, method detailed preparatory work. This includes outcome preliminary measurements, subsequent refined simulations evaluation expected results. experimental setup being built performed at RAL laboratory muon facility is also described.
We report the experimental determination of collision-energy dependence muon transfer rate from ground state muonic hydrogen to oxygen at near-thermal energies. A sharp increase by nearly an order magnitude in energy range 0--70 meV was found that is not observed other gases. The results set a reliable reference for quantum-mechanical calculations low-energy processes with exotic atoms and provide firm measurement hyperfine splitting Zemach radius proton FAMU collaboration.
In this proceeding, a new proposal aiming to improve the precision of proton Zemach radius will be presented. A circularly polarized laser shed on sample muonic hydrogen in its ground state. By observing maximum muon decay asymmetry during scanning wave length, ground-state hyperfine splitting energy can identified, which is directly related radius.citedupays The by measurement estimated three times better compared PSI experiment. This result contribute solution size puzzle.
Background: The energy distribution of excited states populated by the nuclear muon capture reaction can facilitate an understanding mechanism; however, experimental data are fairly sparse.Purpose: We developed a novel method, called in-beam activation to measure production probability residual nuclei capture. For first application new we have measured muon-induced five isotopically enriched palladium targets.Methods: experiment was conducted at RIKEN-RAL facility Rutherford Appleton...
Hiroyuki A. Torii1 on behalf of MuSEUM Collaboration∗. H. Torii1, M. Aoki2, Y. Fukao3, Higashi1, T. Higuchi1, Iinuma3, Ikedo3, K. Ishida4, Iwasaki4, R. Kadono3, O. Kamigaito4, S. Kanda5, D. Kawall6, N. Kawamura3, Koda3, Kojima3, Kubo7, Matsuda1, Mibe3, Miyake3, Mizutani1, Nagamine4, Nishiyama3, Ogitsu3, Okubo3, Saito3, Sasaki3, Shimomura3, P. Strasser3, Sugano3, Tajima1, Tanaka1,4 Tomono4†, E. Torikai8, Toyoda3, Ueno3, Ueno1, Yamamoto3, and Yoshida3. 1Graduate School Arts Sciences,...
The article gives the motivations for measurement of hyperfine splitting (hfs) in ground state muonic hydrogen to explore properties proton at low momentum transfer. It summarizes these proposed methods and finally describes FAMU experiment more detail.
The aim of the FAMU (Fisica degli Atomi Muonici) experiment is to realize first measurement hyperfine splitting (hfs) in 1S state muonic hydrogen Δ Ehfs1S, by using RIKEN-RAL intense pulsed muon beam and a high-energy mid-infrared tunable laser. This requires detailed study transfer mechanism at different temperatures hence epithermal states system. experimental setup involves cryogenic pressurized gas target detection system based on silicon photomultipliers-fiber hodoscopes high purity...
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 1,000 transverse emittance beam (reaccelerated...
For the last 30 years, muon experiments at ISIS have been making a significant contribution to number of scientific fields.However, as community researchers, we are always aiming improve and extend instruments' capabilities.In this paper, will review key developments facility, primary beamline upgrade recent technique developments, before taking forward look new projects, such as: for MuSR, e-learning, detector development sample environment.
Abstract During the AD 68/9 Civil Wars, Galba, Otho, Vitellius and then Vespasian fought for — gained control of Roman Empire. Our textual sources suggest that this was a period serious sustained disruption. However, existing analyses gold coinages produced in show only minor reduction purity coinage. Using X-ray fluorescence, we identify number heavily debased coins issued during many slightly their immediate aftermath. We confirm interior composition these totally non-destructively using...