Search results for "Time of flight detector"

showing 2 items of 2 documents

Production of 4He and 4He‾ in Pb–Pb collisions at sNN=2.76TeV at the LHC

2018

Results on the production of 4 He and He‾4 nuclei in Pb–Pb collisions at sNN=2.76TeV in the rapidity range |y|<1 , using the ALICE detector, are presented in this paper. The rapidity densities corresponding to 0–10% central events are found to be dN/dyHe4=(0.8±0.4(stat)±0.3(syst))×10−6 and dN/dyHe‾4=(1.1±0.4(stat)±0.2(syst))×10−6 , respectively. This is in agreement with the statistical thermal model expectation assuming the same chemical freeze-out temperature ( Tchem=156MeV ) as for light hadrons. The measured ratio of He‾4/4He is 1.4±0.8(stat)±0.5(syst) .

PhysicsNuclear and High Energy PhysicsParticle physicsTime projection chamberLarge Hadron ColliderTime of flight detector010308 nuclear & particles physicsHadron01 natural sciences0103 physical sciencesQuark–gluon plasmaRapidityThermal model010306 general physicsNuclear Physics A
researchProduct

Effects of scintillation light collection on the time resolution of a time-of-flight detector for annihilation quanta

1990

Monte Carlo methods were used to simulate the production and collection of scintillation light in a BaF/sub 2/ crystal. The calculated results were compared to measured values for detectors with different heights. Based on this simulation, a TOF (time-of-flight) detector consisting of two conical BaF/sub 2/ crystals (base radius 18 mm, top radius 15 mm, height 25 mm) was assembled. The total time resolution of this system was (210+or-5) ps FWHM (full width at half maximum) for 511-keV annihilation quanta and was found to be independent of the source position between the detectors. Since the time resolution of the TOF detector system consisting of two conical BaF/sub 2/ crystals is sufficien…

PhysicsNuclear and High Energy PhysicsScintillationAnnihilationTime of flight detectorPhysics::Instrumentation and Detectorsbusiness.industryDetectorMonte Carlo methodRadiusNuclear physicsFull width at half maximumOpticsNuclear Energy and EngineeringScintillation counterElectrical and Electronic EngineeringbusinessIEEE Transactions on Nuclear Science
researchProduct