0000000000605331

AUTHOR

K. Sugita

showing 2 related works from this author

Valence bands of poly(methylmethacrylate) and photoion emission in vacuum ultraviolet region

1992

Photoion and photoelectron yields were measured for poly(methylmethacrylate) in the photon energy region of 8–40 eV using synchrotron radiation. Further, the valence‐band structure was investigated with ultraviolet photoelectron spectra and valence effective Hamiltonian calculations. A significant difference was observed between the photon energy dependencies of photoion and photoelectron yields. The threshold energy for photoion emission was found to be 10.5 eV, while that for photoelectron emission was 8.5 eV, indicating holes created near the valence‐band top do not contribute to the ion emission. At the higher‐energy region, the ion emission efficiency was found to be enhanced in the ph…

PmmaValence BandsAstrophysics::High Energy Astrophysical PhenomenaGeneral Physics and AstronomySynchrotron radiationPhotoelectron photoion coincidence spectroscopyAstrophysics::Cosmology and Extragalactic AstrophysicsPhoton energymedicine.disease_causeSpectral lineX-ray photoelectron spectroscopyEv Range 10−100:FÍSICA [UNESCO]medicinePmma ; Ion Emission ; Electron Emission ; Photoelectron Spectroscopy ; Ev Range 10−100 ; Valence Bands ; Band StructurePhysics::Atomic and Molecular ClustersIon EmissionPhysics::Atomic PhysicsElectron EmissionBand StructureAstrophysics::Galaxy AstrophysicsValence (chemistry)ChemistryPhotoelectron SpectroscopyUNESCO::FÍSICAThreshold energyAtomic physicsUltraviolet
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A trigger system for measurements of proton-induced rare hadronic reactions around Tp=400MeV

2008

Abstract We developed a trigger system for the measurement of proton-induced rare hadronic reactions around the beam kinetic energy T p = 400 MeV based on highly segmented trigger scintillation detectors and programmable logic modules. The trigger system was designed to enhance events with the negative-pion production by the difference of the curvatures of the particle tracks in a magnetic field. Since the production cross-section of the negative-pion by the proton-induced reactions was smaller by about 3 orders of magnitude than the total cross-section around the beam energy, we expected large reduction of the trigger rate by the negative-pion selection. The construction of the trigger sys…

PhysicsNuclear and High Energy PhysicsParticle physicsScintillationProtonOrders of magnitude (temperature)Nuclear TheoryDetectorHadronKinetic energyMagnetic fieldNuclear physicsPhysics::Accelerator PhysicsNuclear ExperimentInstrumentationBeam (structure)Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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