0000000000527410

AUTHOR

A. Howard

showing 3 related works from this author

Beam test results of IHEP-NDL Low Gain Avalanche Detectors(LGAD)

2020

A High-Granularity Timing Detector (HGTD) is proposed based on the Low-Gain Avalanche Detector (LGAD) for the ATLAS experiment to satisfy the time resolution requirement for the up-coming High Luminosity at LHC (HL-LHC). We report on beam test results for two proto-types LGADs (BV60 and BV170) developed for the HGTD. Such modules were manufactured by the Institute of High Energy Physics (IHEP) of Chinese Academy of Sciences (CAS) collaborated with Novel Device Laboratory (NDL) of the Beijing Normal University. The beam tests were performed with 5 GeV electron beam at DESY. The timing performance of the LGADs was compared to a trigger counter consisting of a quartz bar coupled to a SiPM read…

Electron beamNuclear and High Energy PhysicsPhysics - Instrumentation and DetectorsFÍSICA DE ALTA ENERGIAPhysics::Instrumentation and DetectorsFOS: Physical sciences01 natural sciences010305 fluids & plasmassymbols.namesakeSilicon photomultiplierOpticsLGAD0103 physical sciencesGaussian functionelectron: irradiationphotomultiplier: silicon[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]Detectors and Experimental Techniques010306 general physicsInstrumentationphysics.ins-detPhysicsLarge Hadron ColliderLuminosity (scattering theory)business.industryfluctuationDetectorATLAS experimentTime resolutionDESYInstrumentation and Detectors (physics.ins-det)ATLASsymbolsHigh Energy Physics::ExperimentbusinessCFDBeam (structure)performancesemiconductor detector: design
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Lifetime Measurements of the Neutron-RichN=30IsotonesCa50andSc51: Orbital Dependence of Effective Charges in thefpShell

2009

The lifetimes of the first excited states of the N=30 isotones Ca-50 and Sc-51 have been determined using the Recoil Distance Doppler Shift method in combination with the CLARA-PRISMA spectrometers. This is the first time such a method is applied to measure lifetimes of neutron-rich nuclei populated via a multinucleon transfer reaction. This extends the lifetime knowledge beyond the f(7/2) shell closure and allows us to derive the effective proton and neutron charges in the fp shell near the doubly magic nucleus Ca-48, using large-scale, shell-model calculations. These results indicate an orbital dependence of the core polarization along the fp shell.

Nuclear reactionPhysicsRecoilProtonExcited stateNuclear TheoryHadronGeneral Physics and AstronomyNeutronAtomic physicsNuclear ExperimentNucleonEffective nuclear chargePhysical Review Letters
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Lifetime measurements of excited states in neutron-rich nuclei around 48 Ca

2009

The lifetimes of the first excited states of the N = 30 isotones 50Ca and 51Sc and the Z = 18 isotopes 44−46Ar isotopes have been determined using a novel technique that combines the Recoil Distance Doppler Shift method with the CLARA-PRISMA spectrometers in multinucleon transfer reactions. The results allow determinination of the effective charges above 48Ca and test the strength of the N = 28 magic number when moving away from the stability line. Gadea Raga, Andrés, Gadea.Andres@ific.uv.es ; Algora, Alejandro, Alejandro.Algora@ific.uv.es ; Rubio Barroso, Berta, Berta.Rubio@ific.uv.es

Multinucleon transfer reactionMultinucleon transfer reaction ; Isotopes ; Recoil Distance Doppler Shift ; CLARA-PRISMAIsotopes:FÍSICA [UNESCO]:FÍSICA::Nucleónica::Física de partículas [UNESCO]UNESCO::FÍSICAUNESCO::FÍSICA::Nucleónica::Física de partículasCLARA-PRISMARecoil Distance Doppler Shift
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