A5020986780- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Radiation Therapy and Dosimetry
- Radiation Detection and Scintillator Technologies
- Nuclear Materials and Properties
- Graphite, nuclear technology, radiation studies
- Fusion materials and technologies
- Nuclear physics research studies
- Superconducting Materials and Applications
- Radioactive contamination and transfer
- Radioactivity and Radon Measurements
- Particle Detector Development and Performance
- Nuclear and radioactivity studies
- Particle accelerators and beam dynamics
- Medical Imaging Techniques and Applications
- Silicon and Solar Cell Technologies
- Electron and X-Ray Spectroscopy Techniques
- Particle physics theoretical and experimental studies
- Radioactive element chemistry and processing
- X-ray Spectroscopy and Fluorescence Analysis
- Radiation Effects and Dosimetry
- Atomic and Subatomic Physics Research
- Radiopharmaceutical Chemistry and Applications
- Ion-surface interactions and analysis
- Petroleum Processing and Analysis
Kyoto University
2015-2024
Kyoto University Research Reactor Institute
2010-2023
Research Centre Rez
2020
Japan Atomic Energy Agency
2014-2016
Tohoku University
1981-2014
Japan Radioisotope Association
2003-2014
Cyclotron (Netherlands)
2014
Kyoto Notre Dame University
2012
Tokyo University of Agriculture and Technology
1997
Toray Industries, Inc. (Japan)
1996
Abstract We have developed a prototype of the muon beam monitor ( μ BM) for COMET experiment at J-PARC. The aims to search neutrino-less muon-to-electron conversion event in field nucleus, as charged lepton flavor violation process. SiC-based BM will be installed vacuum chamber and located front muon-stopping target main central drift chamber. detector consists SiC PN-diodes dedicated readout electronics. By tailing 256 sensors matrix, profile bunch stability can extracted, then, are...
We successfully revealed the adsorption behavior of actual organic contaminations on a Si wafer surface using gas chromatograph/mass spectrometer system with quartz heat-desorption chamber and two-step concentration trap. Antioxidants contained in case material monomer an oligomer from plastic vessel used production process were confirmed to contaminate wafer. Organic materials atmosphere, such as solvents plasticizers, also observed adsorb during exposure laboratory atmosphere for few...
Abstract Irradiation experiments were performed at the HIMAC (Heavy Ion Medical Accelerator in Chiba) facility, National Institute of Radiological Sciences, Japan. The radioactivity distributions spallation products a thick Cu target obtained by irradiating 230 and 100MeV/nucleon Ne, C, He, p 230MeV/nucleon Ar ions. gamma-ray spectra from thin irradiated samples Al inserted into measured with HPGe detector. From spectra, we spatial distribution radioactive yields about 40 nuclides sample...
Irradiation experiments were performed at the HIMAC (heavy-ion medical accelerator in Chiba) facility, National Institute of Radiological Sciences. The radioactive spallation products a thick Cu target obtained for 230 and 100 MeV/nucleon Ne, C, He, p ions. gamma-ray spectra from irradiated pieces inserted into composite measured with high-purity Ge detector. From spectra, we variation yields depth mass-yield distribution nuclides produced on surface. results show that cross sections...
A quasi-monoenergetic neutron field using the (7)Li(p,n)(7)Be reaction has been developed at ring cyclotron facility Research Center for Nuclear Physics (RCNP), Osaka University. Neutrons were generated from a 10-mm-thick Li target injected by 250, 350 and 392 MeV protons neutrons produced 0 degrees extracted into time-of-flight (TOF) room of 100-m length through concrete collimator 10 x 12 cm aperture 150 thickness. The energy spectra measured 12.7-cm diam long NE213 organic liquid...
To realize the accelerator‐based boron neutron capture therapy (BNCT) at Cyclotron and Radioisotope Center of Tohoku University, feasibility a cyclotron‐based BNCT was evaluated. This study focuses on optimizing epithermal field with an energy spectrum intensity suitable for various combinations neutron‐producing reactions moderator materials. Neutrons emitted from thick (stopping‐length) Ta target, bombarded by 50 MeV protons 300 μA beam current, were selected as source, based measurement...
Secondary neutron-production cross sections have been measured from interactions of 230 MeV/nucleon He, 400 N, Kr, Xe, 500 Fe, and 600 Ne interacting in a variety elemental composite targets. We report the double-differential production sections, angular distributions, energy spectra, total all systems. Neutron energies were using time-of-flight technique at laboratory angles between 5 80 deg. The spectra exhibit behavior previously reported other heavy-ion-induced experiments, namely, peak...
AbstractAbstractExperimental studies of shielding and radiation effects are carried out at Fermi National Accelerator Laboratory (FNAL) under collaboration between FNAL Japan, aiming benchmarking simulation codes studying irradiation for the upgrade design new high-energy accelerator facilities. The purposes this (a) acquisition data in a proton beam energy region above 100 GeV, (b) further evaluation predictive accuracy PHITS MARS codes, (c) modification physics models these if needed, (d)...
Response measurements of a Bonner sphere spectrometer (BSS) were performed for high-energy neutrons up to 400 MeV in quasi-monoenergetic neutron fields at the Research Center Nuclear Physics (RCNP), Osaka University. The field was generated by <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">7</sup> Li(p,n) reaction with resulting spectra consisting monoenergetic peak followed an unwanted continuum tail down low-energy region. Two-angle...
At the National Cancer Center, proton irradiation experiments have been conducted using cyclotron accelerator to measure neutron spectrum by foil activation method. The experimental results demonstrate that high-energy neutrons are bombarded injecting protons onto tungsten target. agreement between of and MCNPX calculations with ENDF/B-VI is around 20% in relative difference C/E (calculation/experiment) values some 209Bi(n, xn)210-x Bi reactions. Here, 209Bi useful obtaining information on...
Study of Muon Interaction and Neutron detection -a program for studies shielding irradiation effect around high energy accelerators has been started until 2007 using proton located in Fermi National Accelerator Laboratory (FNAL) as a collaboration JAPAN FNAL.The series the presentations entitled "Shielding experiments at Fermilab" describes part results this regarding transport secondary particles, neutron muon, from 120 GeV induced reactions through experimental data simulation.In paper,...
This paper describes the results of neutron spectrometry and dose measurements using a Bonner Sphere Spectrometer (BSS) at ring cyclotron facility Research Center for Nuclear Physics (RCNP), Osaka University, Japan. Quasi-monoenergetic fields were generated <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">7</sup> Li (p,n) Be reaction 246 389 MeV protons. Neutrons produced 0° 30° emission angles extracted into time-of-flight (TOF) tunnel, energy...
A shielding experiment using activation detectors was performed at the CERN High-energy AcceleRator Mixed-field (CHARM) facility and Shielding Benchmark Facility (CSBF). The protons (24 GeV/c) were bombarded into a 50-cm-thick copper target, released neutrons transmitted through various shields located vertically upward from target. Ordinary concrete slabs of 40- to 160-cm thicknesses steel 20- 80-cm installed by changing material thickness shield. Activation bismuth, indium, aluminum,...
The lack of double-differential cross-section (DDX) data for neutron production below the incident proton energy 200 MeV hinders validation spallation models in technical applications, such as research and development accelerator-driven systems (ADSs). present study aims to obtain experimental DDX ADS target materials this region identify issues related by comparing them with analytical predictions. DDXs (p,xn) reactions natPb 209Bi 100-MeV were measured over an angular range 30° 150° using...
This paper describes the results of calibration measurements for a Bonner sphere spectrometer (BSS) with 3He proportional counter performed in quasi-monoenergetic neutron fields at Research Center Nuclear Physics (RCNP) University Osaka, Japan. Using 246 MeV and 389 proton beams, nominal peak energies 244 387 were generated via 7Li(p,n)7Be reactions. At high energies, spectra measured by means time-of-flight (TOF) method. The low-energy part determined BSS down to thermal using MSANDB...
For validating the number of displacements per atom (dpa) for tungsten under high-energy proton irradiation, we measured displacement cross sections related to defect-induced electrical resistivity changes in a wire sample irradiation with 389-MeV protons 10 K. The Gifford–McMahon cryocooler was used cool using conductive coolant via thermal conduction plates oxygen-free high-conductivity copper and insulation sheets aluminum nitride ceramic. In this experiment, section 1612 ± 371 b at 389...