0000000000408290

AUTHOR

I. Goncalves

showing 2 related works from this author

Neutron capture cross section measurements for nuclear astrophyisics at CERN n_TOF

2005

A series of neutron capture cross section measurements of interest to nuclear astrophysics have been recently performed at n_TOF, the neutron spallation source operating at CERN. The low repetition frequency of the proton beam driver, the extremely high instantaneous neutron flux, and the low background conditions in the experimental area are optimal for capture cross section measurements on low-mass or radioactive samples. An overview of the measurements performed during the two experimental campaigns in 2002 and 2003 is presented with special emphasis on the measurement of the capture cross sections of the Os isotopes relevant for the cosmochronology based on the Re/Os clock. http://www.s…

Nuclear and High Energy PhysicsAstrofísica nuclearNeutron cross sectionsProtonAstrophysics::High Energy Astrophysical PhenomenaNuclear Theory[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]01 natural sciencesNeutrons -- SeccionsNuclear physicsCross section (physics)Neutron flux0103 physical sciencesNeutron cross sectionNuclear astrophysicsSpallationNeutron010306 general physicsNuclear ExperimentPhysicsNeutronsLarge Hadron Collider:Física [Àrees temàtiques de la UPC]010308 nuclear & particles physicsRadioactivityPhysics::Accelerator PhysicsNuclear astrophysicsFísica nuclear
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Measurement of the n-TOF beam profile with a micromegas detector

2004

A Micromegas detector was used in the neutron Time-Of-Flight (n_TOF) facility at CERN to evaluate the spatial distribution of the neutron beam as a function of its kinetic energy. This was achieved over a large range of neutron energies by using two complementary processes: at low energy by capture of a neutron via the 6Li(n,[alpha])t reaction, and at high energy by elastic scattering of neutrons on gas nuclei (argon+isobutane or helium+isobutane). Data are compared to Monte Carlo simulations and an analytic function fitting the beam profile has been calculated with a sufficient precision to use in neutron capture experiments at the n_TOF facility. http://www.sciencedirect.com/science/artic…

Elastic scatteringPhysicsNuclear and High Energy PhysicsArgonPhysics::Instrumentation and DetectorsAstrophysics::High Energy Astrophysical PhenomenaBeam profileNuclear Theorychemistry.chemical_elementMicroMegas detectorNUCLEAR PHYSICSNeutron radiationNuclear physicsNeutron capturechemistryNEUTRON BEAMSNeutron cross sectionMICROMEGAS DETECTORNeutron detectionNeutron beam profilerNeutronNuclear ExperimentInstrumentationMicromegas
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