0000000000139465

AUTHOR

R. Snyder

showing 3 related works from this author

High Resolution Spectroscopy ofBΛ12by Electroproduction

2007

An experiment measuring electroproduction of hypernuclei has been performed in Hall A at Jefferson Lab on a $^{12}$C target. In order to increase counting rates and provide unambiguous kaon identification two superconducting septum magnets and a Ring Imaging CHerenkov detector (RICH) were added to the Hall A standard equipment. An unprecedented energy resolution of less than 700 keV FWHM has been achieved. Thus, the observed \lam{12}{B} spectrum shows for the first time identifiable strength in the core-excited region between the ground-state {\it s}-wave $\Lambda$ peak and the 11 MeV {\it p}-wave $\Lambda$ peak.

PhysicsSuperconductivity010308 nuclear & particles physicsResolution (electron density)General Physics and AstronomyOrder (ring theory)Lambda01 natural sciencesRing-imaging Cherenkov detectorNuclear physicsFull width at half maximum0103 physical sciencesNuclear Experiment010306 general physicsSpectroscopyEnergy (signal processing)Physical Review Letters
researchProduct

New Measurements of the Transverse Beam Asymmetry for Elastic Electron Scattering from Selected Nuclei

2012

We have measured the beam-normal single-spin asymmetry $A_n$ in the elastic scattering of 1-3 GeV transversely polarized electrons from $^1$H and for the first time from $^4$He, $^{12}$C, and $^{208}$Pb. For $^1$H, $^4$He and $^{12}$C, the measurements are in agreement with calculations that relate $A_n$ to the imaginary part of the two-photon exchange amplitude including inelastic intermediate states. Surprisingly, the $^{208}$Pb result is significantly smaller than the corresponding prediction using the same formalism. These results suggest that a systematic set of new $A_n$ measurements might emerge as a new and sensitive probe of the structure of heavy nuclei.

Elastic scatteringPhysics010308 nuclear & particles physicsScatteringmedia_common.quotation_subjectFOS: Physical sciencesGeneral Physics and AstronomyElastic electronchemistry.chemical_elementElectron[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]01 natural sciencesAsymmetryAmplitudechemistryExcited state0103 physical sciencesNuclear Experiment (nucl-ex)Atomic physics010306 general physicsNuclear ExperimentNuclear ExperimentHeliummedia_common
researchProduct

Spectroscopy ofLiΛ9by electroproduction

2015

Background: In the absence of accurate data on the free two-body hyperon-nucleon interaction, the spectra of hypernuclei provides information on the details of the effective hyperon-nucleon interaction.Purpose: To obtain a high-resolution binding-energy spectrum for the ${}^{9}\mathrm{Be}(e,{e}^{\ensuremath{'}}{K}^{+})_{\ensuremath{\Lambda}}^{9}\mathrm{Li}$ reaction.Method: Electroproduction of the hypernucleus $_{\ensuremath{\Lambda}}^{9}\mathrm{Li}$ has been studied for the first time with sub-MeV energy resolution in Hall A at Jefferson Lab on a $^{9}\mathrm{Be}$ target. In order to increase the counting rate and to provide unambiguous kaon identification, two superconducting septum magn…

SuperconductivityPhysicsNuclear and High Energy PhysicsNuclear TheoryOrder (ring theory)Atomic physicsNuclear ExperimentGround stateHypernucleusSpectroscopyLambdaEnergy (signal processing)Spectral linePhysical Review C
researchProduct