0000000000617837

AUTHOR

F. Atchison

showing 2 related works from this author

Transmission of very slow neutrons through material foils and its influence on the design of ultracold neutron sources

2009

At the Paul Scherrer Institute (PSI), a very intense source of ultracold neutrons (UCN) is being built. The UCN converter of solid deuterium must be contained in a vessel. Produced UCN leave that vessel through its top lid. To decide on the design of the vessel and the top lid, we have measured the transmission of neutrons with velocities between 3 and 20 m/s through different material foils. Contrary to expectations, we found that transmission through aluminium and aluminium alloys is equal or even higher compared to zirconium and reactor-grade zirconium alloys, respectively.

PhysicsNuclear and High Energy PhysicsZirconiumZirconium alloychemistry.chemical_elementNuclear physicsTransmission (telecommunications)chemistryDeuteriumAluminiumUltracold neutronsNeutron sourceNeutronInstrumentationNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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Direct Experimental Verification of Neutron Acceleration by the Material Optical Potential of SolidH22

2008

We have measured the acceleration of neutrons by the material optical potential of solid $^{2}\mathrm{H}_{2}$. Using a gravitational spectrometer, we find a minimal kinetic energy ${E}_{c}=(99\ifmmode\pm\else\textpm\fi{}7)\text{ }\text{ }\mathrm{neV}$ of neutrons from a superthermal ultracold neutron (UCN) source with solid $^{2}\mathrm{H}_{2}$ as an UCN converter. The result is in excellent agreement with theoretical predictions, ${E}_{c}=106\text{ }\text{ }\mathrm{neV}$.

PhysicsNuclear physicsHadronUltracold neutronsGeneral Physics and AstronomyElementary particleNeutronFermionAtomic physicsNuclear ExperimentNucleonKinetic energyEnergy (signal processing)Physical Review Letters
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