0000000000951082

AUTHOR

Y. Ayyad

showing 3 related works from this author

The ASY-EOS experiment at GSI: Investigating the symmetry energy at supra-saturation densities

2012

The elliptic-flow ratio of neutrons with respect to protons in reactions of neutron rich heavy-ions systems at intermediate energies has been proposed as an observable sensitive to the strength of the symmetry term in the nuclear Equation Of State (EOS) at supra-saturation densities. The recent results obtained from the existing FOPI/LAND data for $^{197}$Au+$^{197}$Au collisions at 400 MeV/nucleon in comparison with the UrQMD model allowed a first estimate of the symmetry term of the EOS but suffer from a considerable statistical uncertainty. In order to obtain an improved data set for Au+Au collisions and to extend the study to other systems, a new experiment was carried out at the GSI la…

Particle physicsHistoryQC1-999Nuclear TheoryFOS: Physical sciencesand isobaric spin 24.10.Pa Thermal and statistical models[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]EducationNuclear physicsPhysics and Astronomy (all)nuclear physics; heavy-ions; symmetry energy; Au+Au collisionsNeutronNuclear Experiment (nucl-ex)Nuclear ExperimentNuclear ExperimentComputingMilieux_MISCELLANEOUSPhysicssezelePhysicsOrder (ring theory)Nuclear equation of stateObservableNuclear Experiment; Nuclear Experiment21.65.-f Nuclear matter 27.80.+w 190(less-than-or-equal-to)A(less-than-or-equal-to)219 24.60.-k Statistical theory and fluctuations 25.75.Gz Particle correlations and fluctuations 21.10.Hw SpinSymmetry (physics)Term (time)Computer Science ApplicationsparityNuclear reactionsSaturation (chemistry)NucleonEnergy (signal processing)
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β-delayed neutron emission measurements around the third r-process abundance peak

2013

This contribution summarizes an experiment performed at GSI (Germany) in the neutron-rich region beyond N=126. The aim of this measurement is to provide the nuclear physics input of relevance for r-process model calculations, aiming at a better understanding of the third r-process abundance peak. Many exotic nuclei were measured around 211Hg and 215Tl. Final ion identification diagrams are given in this contribution. For most of them, we expect to derive halflives and and β-delayed neutron emission probabilities. The detectors used in this experiment were the Silicon IMplantation and Beta Absorber (SIMBA) detector, based on an array of highly segmented silicon detectors, and the BEta deLayE…

PhysicsNuclear physicsPhysics::Instrumentation and DetectorsNucleosynthesisNeutron emissionDouble beta decayDetectorr-processNuclear ExperimentDelayed neutronAbundance of the chemical elementsIon
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βdecay of102Y produced in projectile fission of238U

2012

The population of 102Zr following the β decay of 102Y produced in the projectile fission of 238U at the GSI facility in Darmstadt, Germany has been studied. 102Y is known to ß decay into 102Zr via two states, one of high spin and the other low spin. These states preferentially populate different levels in the 102Zr daughter. In this paper the intensities of transitions in 102Zr observed are compared with those from the decay of the low-spin level studied at the TRISTAN facility at Brookhaven National Laboratory and of the high-spin level studied at the JOSEF separator at the Kernforschungsanlage Jülich.

PhysicsHistoryeducation.field_of_studyCluster decayFissionProjectilePopulationBeta decayddc:Computer Science ApplicationsEducationNuclear physicsSubatomic PhysicsHigh Energy Physics::ExperimentAtomic physicsNuclear ExperimentSpin (physics)National laboratoryeducationJournal of Physics: Conference Series
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