0000000000505327

AUTHOR

J. Vollaire

showing 2 related works from this author

Development of a liquid Pb-Bi target for high-power ISOL facilities

2016

Abstract This paper describes some R&D activities conducted in support of the design and safe operation of a high-power liquid Pb-Bi target within the LIEBE (Liquid Eutectic Lead Bismuth Loop Target for EURISOL) project. The target material is lead bismuth eutectic (LBE) which also acts as a primary coolant. As a consequence of interaction of the highly pulsed 1.4-GeV protons at ISOLDE with the target, heat powers of the order of 2 GW would be instantaneously deposited in the target during a bunch. Considerable R&D effort is thus required to demonstrate its continued coolability and structural integrity. This paper mainly reports on the conjugate flow (CFD) and heat deposition (Monte Carlo)…

Nuclear and High Energy PhysicsLiquid metalMaterials science010308 nuclear & particles physicsLead-bismuth eutecticNuclear engineeringMonte Carlo methodRadiochemistrychemistry.chemical_elementFluid mechanics01 natural sciences010305 fluids & plasmasBismuthCoolantchemistry0103 physical sciencesDeposition (phase transition)InstrumentationEutectic systemNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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Be7(n,α)He4Reaction and the Cosmological Lithium Problem: Measurement of the Cross Section in a Wide Energy Range at n_TOF at CERN

2016

The energy-dependent cross section of the (7)Bed(n,alpha)He-4 reaction, of interest for the so-called cosmological lithium problem in big bang nucleosynthesis, has been measured for the first time from 10 meV to 10 keV neutron energy. The challenges posed by the short half-life of Be-7 and by the low reaction cross section have been overcome at n_TOF thanks to an unprecedented combination of the extremely high luminosity and good resolution of the neutron beam in the new experimental area (EAR2) of the n_TOF facility at CERN, the availability of a sufficient amount of chemically pure Be-7, and a specifically designed experimental setup. Coincidences between the two alpha particles have been…

Nuclear reactionPhysics010308 nuclear & particles physicsGeneral Physics and Astronomychemistry.chemical_elementAlpha particleNeutron radiation7. Clean energy01 natural sciencesNeutron temperatureNuclear physicsBig Bang nucleosynthesischemistry13. Climate actionNucleosynthesis0103 physical sciencesNeutronLithiumNuclear Experiment010306 general physicsPhysical Review Letters
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