K. Oyama

ORCID: 0000-0002-8576-1268
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About
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Research Areas
  • High-Energy Particle Collisions Research
  • Particle physics theoretical and experimental studies
  • Quantum Chromodynamics and Particle Interactions
  • Nuclear reactor physics and engineering
  • Particle Detector Development and Performance
  • Nuclear physics research studies
  • Radiation Detection and Scintillator Technologies
  • Dark Matter and Cosmic Phenomena
  • Superconducting Materials and Applications
  • Cosmology and Gravitation Theories
  • Statistical Methods and Bayesian Inference
  • Particle Accelerators and Free-Electron Lasers
  • Atomic and Subatomic Physics Research
  • Advanced NMR Techniques and Applications
  • Quantum, superfluid, helium dynamics
  • Pulsars and Gravitational Waves Research
  • Computational Physics and Python Applications
  • Hydrogen embrittlement and corrosion behaviors in metals
  • Nuclear Materials and Properties
  • Radiation Effects in Electronics
  • Atomic and Molecular Physics
  • Photocathodes and Microchannel Plates
  • High Temperature Alloys and Creep
  • Advanced Chemical Physics Studies
  • Nuclear Physics and Applications

Nagasaki Institute of Applied Science
2016-2025

A. Alikhanyan National Laboratory
2015-2024

European Organization for Nuclear Research
2012-2024

Kurchatov Institute
2012-2023

China Institute of Atomic Energy
2003-2019

Chicago State University
2019

GSI Helmholtz Centre for Heavy Ion Research
2018

Heidelberg University
2008-2017

The University of Tokyo
2002-2017

Bogolyubov Institute for Theoretical Physics
2011-2017

A double-hyperfragment event has been found in a hybrid-emulsion experiment. It is identified uniquely as the sequential decay of ( 6)(LambdaLambda)He emitted from Xi(-) hyperon nuclear capture at rest. The mass and Lambda-Lambda interaction energy DeltaB(LambdaLambda) have measured for first time devoid ambiguities due to possibilities excited states. value 1.01+/-0.20(+0.18)(-0.11) MeV. This demonstrates that weakly attractive.

10.1103/physrevlett.87.212502 article EN Physical Review Letters 2001-11-02

A hybrid experiment with nuclear emulsion and scintillating-fiber detectors (KEK-E373) has been performed to search for double-strangeness systems. Among about 10${}^{3}$ events of ${\ensuremath{\Xi}}^{\ensuremath{-}}$ hyperons captured at rest by nuclei, we have observed four which clearly show the topology cascade weak decays double-$\ensuremath{\Lambda}$ hypernuclei including ``Nagara'' event. Regarding Nagara event, values two-$\ensuremath{\Lambda}$ binding energy...

10.1103/physrevc.88.014003 article EN Physical Review C 2013-07-17

We find a remarkable agreement of the excitation energy spectrum ${}^{208}\mathrm{Pb}{(d,}^{3}\mathrm{He})$ reaction measured at ${T}_{d}=600\mathrm{MeV}$ near ${\ensuremath{\pi}}^{\ensuremath{-}}$ production threshold with its theoretical prediction. Their comparison leads us to assign distinct narrow peak observed about 5 MeV below formation bound pionic states ${\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\bigotimes}}^{207}\mathrm{Pb}$ quasisubstitutional configurations...

10.1103/physrevc.62.025202 article EN Physical Review C 2000-07-13

The deeply bound pionic states ${(1s,2p)}_{{\ensuremath{\pi}}^{\ensuremath{-}}}{\ensuremath{\bigotimes}}^{207}\mathrm{Pb}$ were observed for the first time, by investigating ${}^{208}\mathrm{Pb}{(d,}^{3}\mathrm{He})$ reaction at a beam energy of ${T}_{d}=604.3\mathrm{MeV}$ and ejectile angles around 0\ifmmode^\circ\else\textdegree\fi{}. measured momentum distribution ${}^{3}\mathrm{He}$ particles was used to determine Q value spectrum in region...

10.1103/physrevc.62.025201 article EN Physical Review C 2000-07-13

10.1016/j.nima.2010.02.249 article EN Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 2010-03-04

Measurements of the cross sections reference processes seen by ALICE trigger system were obtained based on beam properties measured from van der Meer scans.The measurements are essential for absolute section determinations physics processes.The paper focuses instrumental and technical aspects detectors accelerators, including a description extraction scan.As result, given proton-proton collisions at two energies; √ s=2.76 TeV 7 TeV, together with systematic uncertainties originating...

10.1088/0954-3899/38/12/124131 article EN Journal of Physics G Nuclear and Particle Physics 2011-11-10

Cross sections of reference trigger processes were obtained based on beam property measurements in dedicated luminosity calibration experiments (van der Meer scans). These cross-sections are essential for absolute cross section determinations physics processes. The presented pp collisions at two center mass energies; 2.76 TeV and 7 TeV, Pb-Pb together with a discussion the systematic uncertainty originating from intensity rate measurement uncertainties.

10.48550/arxiv.1305.7044 preprint EN other-oa arXiv (Cornell University) 2013-01-01

In this paper, we describe a method of modeling the global solar irradiance on clear sky. The proposed is based astrological phenomena, with which can estimate few days, several months, and some years. To high accuracy, it necessary to calculate radiation outside Earth's atmosphere taking into account revolution around sun rotation its axis. Our model compared data in Chronological Science Tables as well those measured horizontal surface. simulation results using agree very data.

10.1109/icrera.2015.7418519 article EN 2015-11-01
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