0000000000073548

AUTHOR

Masatoshi Itoh

showing 3 related works from this author

12C(p,p′) scattering measurement at forward angles

2006

Experimental method of measuring inelastic proton scattering with high-resolution at forward angles including zero degrees has been developed. An energy resolution of 20 keV and a scattering angle resolution of 0.5 degrees have been achieved as well as low background condition and a reliable background subtraction method. The experimental technique was applied to the 12 C (p,p′) reaction for studying the property of the second 0+ state at 7.7 MeV and a broad bump around Ex~10 MeV , where the presence of a 2+ state was reported from the 12 C (α,α′) measurement. Preliminary spectra and angular distributions are shown.

PhysicsNuclear and High Energy PhysicsBackground subtractionbusiness.industryScatteringResolution (electron density)General Physics and AstronomyAstronomy and AstrophysicsSpectral lineOpticsProton scatteringAtomic physicsbusinessEnergy (signal processing)Modern Physics Letters A
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Complete Electric Dipole Response and the Neutron Skin inPb208

2011

A benchmark experiment on Pb-208 shows that polarized proton inelastic scattering at very forward angles including 0 degrees is a powerful tool for high-resolution studies of electric dipole (E1) and spin magnetic dipole (M1) modes in nuclei over a broad excitation energy range to test up-to-date nuclear models. The extracted E1 polarizability leads to a neutron skin thickness r(skin) = 0.156(-0.021)(+0.025) fm in Pb-208 derived within a mean-field model [Phys. Rev. C 81, 051303 (2010)], thereby constraining the symmetry energy and its density dependence relevant to the description of neutron stars.

PhysicsDipoleProtonPolarizabilityGeneral Physics and AstronomyNeutronInelastic scatteringElectric dipole transitionAtomic physicsMagnetic dipoleExcitationPhysical Review Letters
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Measurement of high energy resolution inelastic proton scattering at and close to zero degrees

2009

13 pages, 15 figures.-- Printed version published Jul 1, 2009.

Nuclear and High Energy PhysicsHigh energy resolutionM1 excitationForward scatterCyclotronMeasurement at 0 degreesTRANSITIONSInelastic scatteringDispersion matchingISOVECTORlaw.inventionSHELL NUCLEINuclear physicsNUCLEON-NUCLEON INTERACTIONlawBEAM LINEE1 Coulomb excitationFOCAL-PLANE POLARIMETERInstrumentationInelastic proton scatteringPolarization transfer coefficientsISOSCALARElastic scatteringPhysicsBackground subtractionPolarization transfer coefficientScatteringResolution (electron density)SPIN EXCITATIONSBeamlinePhysics::Accelerator PhysicsMeasurement at 0ºAtomic physicsSPECTROMETER GRAND RAIDENINTERMEDIATE ENERGIES
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