0000000000750837

AUTHOR

V. Simion

showing 12 related works from this author

Out-of-plane emission of nuclear matter in Au+Au collisions between 100 and 800 AMeV

1997

We present new experimental results concerning the azimuthal distributions of proton-likes, light and intermediate mass fragments at midrapidity for Au(100-800 AMeV)+Au collisions measured with the FOPI phase-I detector at GSI in Darmstadt. The azimuthal distributions are investigated as a function of the collision centrality, the incident energy, the fragment charge and transverse momentum. The azimuthal anisotropy is maximum for impact parameters around 7 fm. Intermediate mass fragments present a stronger out-of-plane emission signal than light fragments and a saturation is reached for Z greater than or equal to 4. The azimuthal anisotropy increases with the fragment transverse momentum a…

PhysicsNuclear reactionNuclear and High Energy PhysicsPhase (waves)Charge (physics)Nuclear matterAzimuthNuclear physicsNuclear Reactions; Au-197 (Au-197; X); E=100-800 MeV/nucleon; Azimuthal anisotropy; Out-of-plane emissionAtomic physicsNuclear ExperimentAnisotropySaturation (magnetic)Beam (structure)Nuclear Physics A
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Cluster Formation during Expansion of Hot and Compressed Nuclear Matter Produced in Central Collisions of Au on Au at 250AMeV

1995

Complete distributions of the light and intermediate mass fragments ({ital Z}=1--6) produced within the polar angular range 1{sup {circ}}{le}{Theta}{sub lab}{le}30{sup {circ}} in highly central collisions of 250{ital A} MeV Au+Au are presented. The results of this measurement and a model analysis are used to study the expansion and clustering of the hot and compressed transient state formed in central collisions of such a heavy system. The influence of the initial conditions on the final observables is discussed.

PhysicsAngular rangeCluster (physics)General Physics and AstronomyPolarObservableAtomic physicsNuclear ExperimentNuclear matterPhysical Review Letters
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The ALICE experiment at the CERN LHC

2008

Journal of Instrumentation 3(08), S08002 (2008). doi:10.1088/1748-0221/3/08/S08002

visible and IR photonsLiquid detectorshigh energyPhotonPhysics::Instrumentation and DetectorsTransition radiation detectorsTiming detectors01 natural sciencesOverall mechanics designParticle identificationSoftware architecturesParticle identification methodsGaseous detectorscluster findingDetector cooling and thermo-stabilizationDetector groundingParticle tracking detectors[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Special cablesDetector alignment and calibration methodsDetectors and Experimental TechniquesNuclear ExperimentVoltage distributions.Photon detectors for UVInstrumentationMathematical PhysicsQuantum chromodynamicsPhysicsLarge Hadron ColliderSpectrometersPhysicsDetectorcalibration and fitting methodsTransition radiation detectorScintillatorsData processing methodsAnalysis and statistical methodsData reduction methodsParticle physicsCherenkov and transition radiationTime projection chambers610dE/dx detectorsNuclear physicsCalorimetersPattern recognitionGamma detectors0103 physical sciencesddc:610Solid state detectors010306 general physicsMuonInstrumentation for heavy-ion acceleratorsSpectrometerLarge detector systems for particle and astroparticle physics010308 nuclear & particles physicsCERN; LHC; ALICE; heavy ion; QGPCherenkov detectorsComputingVoltage distributionsManufacturingscintillation and light emission processesanalysis and statistical methods; calorimeters; cherenkov and transition radiation; cherenkov detectors; computing; data processing methods; data reduction methods; de/dx detectors; detector alignment and calibration methods; detector cooling and thermo-stabilization; detector design and construction technologies and materials; detector grounding; gamma detectors; gaseous detectors; instrumentation for heavy-ion accelerators; instrumentation for particle accelerators and storage rings - high energy; large detector systems for particle and astroparticle physics; liquid detectors; manufacturing; overall mechanics design; particle identification methods; particle tracking detectors; pattern recognition; cluster finding; calibration and fitting methods; photon detectors for uv; visible and ir photons; scintillators; scintillation and light emission processes; simulation methods and programs; software architectures; solid state detectors; special cables; spectrometers; time projection chambers; timing detectors; transition radiation detectors; voltage distributionsInstrumentation for particle accelerators and storage ringsInstrumentation; Mathematical PhysicsHigh Energy Physics::ExperimentSimulation methods and programsDetector design and construction technologies and materials
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Sideward flow in Au + Au collisions at 400 A.MeV

1995

Abstract We present new experimental data obtained with the FOPI detector at SIS, for the Au + Au heavy-ion collisions at 400 A MeV incident energy. The sideward flow, determined from a method without reaction-plane reconstruction, and the nuclear stopping are studied as a function of the centrality of the collisions. In order to study the nuclear in-medium effects, which act on the NN cross sections and potential and hence on experimental observables like the nuclear-matter flow and stopping, these results are compared with the predictions of two different QMD versions. The first one offers a fully microscopic calculation of the cross sections and potential in the G-matrix formalism and na…

Nuclear reactionPhysicsNuclear and High Energy PhysicsParticle physics010308 nuclear & particles physicsNuclear TheoryDetectorObservable01 natural sciences7. Clean energyNuclear physicsFormalism (philosophy of mathematics)0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Incident energyNuclear Experiment010306 general physics
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A highly-segmented ΔE-time-of-flight wall as forward detector of the 4π-system for charged particles at the SIS/ESR accelerator

1993

Abstract At the SIS/ESR accelerator facility at GSI in Darmstadt the 4π-detector system FOPI is under construction at present. It is designed for the investigation of central collisions of heavy ions in the energy range up to 2 A GeV. As phase I of this detector a forward wall has been built and used in various experiments. It comprizes a total number of 764 scintillators with an additional shell of 188 thin ΔE -detectors in front of it and covers the full azimuth of the polar angles from 1° to 30°. The velocity and the nuclear charge of the fragments are determined by a combined time-of-flight and ΔE measurement.

PhysicsNuclear and High Energy PhysicsRange (particle radiation)Wire chamberPhysics::Instrumentation and DetectorsNuclear TheoryDetectorScintillatorParticle detectorCharged particleNuclear physicsTime of flightIonization chamberAtomic physicsNuclear ExperimentInstrumentationNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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Evidence for collective expansion in light-particle emission following Au+Au collisions at 100, 150 and 250 A·MeV

1995

Abstract Light-particle emission from Au+Au collisions has been studied in the bombarding-energy range 100–250 A ·MeV, using ΔE − E R telescopes in coincidence with the FOPI detector in its phase I configuration. Center-of-mass energy spectra have been measured for Z = 1,2 isotopes emitted in central collisions at CM polar angles between 60° and 90°. Evidence for a collective expansion is reported, on the basis of the mean kinetic energies of hydrogen isotopes. Comparison is presented with statistical calculations (WIX code). For CM kinetic energy spectra, fair agreement is found between data and a recently developed transport model.

Nuclear reactionPhysicsNuclear and High Energy PhysicsRange (particle radiation)IsotopeHydrogenPhase (waves)chemistry.chemical_elementKinetic energySpectral lineCoincidenceNuclear physicschemistryAtomic physicsNuclear ExperimentNuclear Physics A
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"Table 5" of "Evidence for collective expansion in light-particle emission following Au+Au collisions at 100, 150 and 250 A��MeV"

2015

No description provided.

InclusiveAU AU --> HE XNUCLEUS NUCLEUS --> P XAU AU --> P XAU AU --> HE3 XAU AU --> TRITIUM XNUCLEUS NUCLEUS --> DEUT XNUCLEUS NUCLEUS --> TRITIUM XAU AU --> DEUT XNUCLEUS NUCLEUS --> HE3 XNUCLEUS NUCLEUS --> HE XMULT
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"Table 1" of "Evidence for collective expansion in light-particle emission following Au+Au collisions at 100, 150 and 250 A��MeV"

2015

No description provided.

InclusiveAU AU --> HE XNUCLEUS NUCLEUS --> P XAU AU --> P XAU AU --> HE3 XAU AU --> TRITIUM XEKINNUCLEUS NUCLEUS --> DEUT XNUCLEUS NUCLEUS --> TRITIUM XAU AU --> DEUT XNUCLEUS NUCLEUS --> HE3 XNUCLEUS NUCLEUS --> HE X
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"Table 2" of "Evidence for collective expansion in light-particle emission following Au+Au collisions at 100, 150 and 250 A��MeV"

2015

No description provided.

InclusiveAU AU --> HE XNUCLEUS NUCLEUS --> P XAU AU --> P XAU AU --> HE3 XAU AU --> TRITIUM XEKINNUCLEUS NUCLEUS --> DEUT XNUCLEUS NUCLEUS --> TRITIUM XAU AU --> DEUT XNUCLEUS NUCLEUS --> HE3 XNUCLEUS NUCLEUS --> HE X
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"Table 4" of "Evidence for collective expansion in light-particle emission following Au+Au collisions at 100, 150 and 250 A��MeV"

2015

No description provided.

InclusiveAU AU --> HE XNUCLEUS NUCLEUS --> P XAU AU --> P XAU AU --> HE3 XAU AU --> TRITIUM XNUCLEUS NUCLEUS --> DEUT XNUCLEUS NUCLEUS --> TRITIUM XAU AU --> DEUT XNUCLEUS NUCLEUS --> HE3 XNUCLEUS NUCLEUS --> HE XMULT
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"Table 6" of "Evidence for collective expansion in light-particle emission following Au+Au collisions at 100, 150 and 250 A��MeV"

2015

No description provided.

InclusiveAU AU --> HE XNUCLEUS NUCLEUS --> P XAU AU --> P XAU AU --> HE3 XAU AU --> TRITIUM XNUCLEUS NUCLEUS --> DEUT XNUCLEUS NUCLEUS --> TRITIUM XAU AU --> DEUT XNUCLEUS NUCLEUS --> HE3 XNUCLEUS NUCLEUS --> HE XMULT
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"Table 3" of "Evidence for collective expansion in light-particle emission following Au+Au collisions at 100, 150 and 250 A��MeV"

2015

No description provided.

InclusiveAU AU --> HE XNUCLEUS NUCLEUS --> P XAU AU --> P XAU AU --> HE3 XAU AU --> TRITIUM XEKINNUCLEUS NUCLEUS --> DEUT XNUCLEUS NUCLEUS --> TRITIUM XAU AU --> DEUT XNUCLEUS NUCLEUS --> HE3 XNUCLEUS NUCLEUS --> HE X
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