0000000000476664

AUTHOR

V.m. Rodriguez

showing 3 related works from this author

Hypernuclear Spectroscopy at JLab Hall C

2010

Abstract Since the 1st generation experiment, E89-009, which was successfully carried out as a pilot experiment of (e,e'K+) hypernuclear spectroscopy at JLab Hall C in 2000, precision hypernuclear spectroscopy by the (e,e'K+) reactions made considerable progress. It has evolved to the 2nd generation experiment, E01-011, in which a newly constructed high resolution kaon spectrometer (HKS) was installed and the “Tilt method” was adopted in order to suppress large electromagnetic background and to run with high luminosity. Preliminary high-resolution spectra of 7 Λ He and 28 Λ Al together with that of 12 Λ B that achieved resolution better than 500 keV(FWHM) were obtained. The third generation…

Nuclear physicsPhysicsNuclear and High Energy PhysicsParticle physicsFull width at half maximumLuminosity (scattering theory)Electron spectrometerSpectrometerResolution (electron density)Calibrationhypernuclear; electroproduction; kaon spectrometer; electron spectrometerSpectroscopySpectral lineNuclear Physics A
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High resolution spectroscopic study ofBeΛ10

2016

Spectroscopy of a Be-10(Lambda) hypernucleus was carried out at JLab Hall C using the (e, e' K+) reaction. A new magnetic spectrometer system (SPL+ HES+ HKS), specifically designed for high resolution hypernuclear spectroscopy, was used to obtain an energy spectrum with a resolution of similar to 0.78 MeV (FWHM). The well-calibrated spectrometer system of the present experiment using p(e, e' K+)Lambda, Sigma(0) reactions allowed us to determine the energy levels; and the binding energy of the ground-state peak (mixture of 1(-) and 2(-) states) was found to be B-Lambda = 8.55 +/- 0.07(stat.) +/- 0.11(sys.) MeV. The result indicates that the ground-state energy is shallower than that of an em…

PhysicsSpectrometer010308 nuclear & particles physicsBinding energyResolution (electron density)HypernucleusLambda01 natural sciencesExcited state0103 physical sciencesAtomic physicsNuclear Experiment010306 general physicsSpectroscopyGround statePhysical Review C
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Direct measurements of the lifetime of medium-heavy hypernuclei

2018

Abstract The lifetime of a Λ particle embedded in a nucleus (hypernucleus) decreases from that of free Λ decay mainly due to the opening of the Λ N → N N weak decay channel. However, it is generally believed that the lifetime of a hypernucleus attains a constant value (saturation) for medium to heavy hypernuclear masses, yet this hypothesis has been difficult to verify. This paper presents a direct measurement of the lifetime of medium-heavy hypernuclei that were hyper-fragments produced by fission or break-up from heavy hypernuclei initially produced with a 2.34 GeV photon-beam incident on thin Fe, Cu, Ag, and Bi target foils. For each event, fragments were detected in coincident pairs by …

PhysicsNuclear and High Energy PhysicsRange (particle radiation)010308 nuclear & particles physicsFissionHypernuclei ; Lifetime ; Fragment ; Hyper-fragment ; Weak decayWeak interactionHypernucleus01 natural sciencesNuclear physicsCoincident0103 physical sciencesParticle010306 general physicsSaturation (chemistry)Event (particle physics)Nuclear Physics A
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