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RESEARCH PRODUCT

Cubic boron nitride: A new prospective material for ultracold neutron application

G. HampelYu. SobolevM. MeisterWerner HeilUlrich SchmidtA. KnechtA. KnechtCh. Plonka-spehrNorbert WiehlL. GöltlL. GöltlT. LauerP. ReichertJ. ZennerThomas LangYu. V. BorisovJ. V. KratzM. DaumM. DaumM. DaumM. KeuneckeYu. N. PokotilovskiN. Du FresneTh. Krist

subject

PhysicsNuclear and High Energy PhysicsSpectrometerPhysics::Instrumentation and DetectorsFOS: Physical sciencesDielectricCritical ionization velocityTRIGACondensed Matter::Materials Sciencechemistry.chemical_compoundNuclear magnetic resonancechemistryBoron nitrideNeutronResearch reactorNeutron reflectometryNuclear Experiment (nucl-ex)Atomic physicsNuclear ExperimentNuclear ExperimentInstrumentation

description

Abstract At the ultracold neutron (UCN) source of the TRIGA research reactor in Mainz, we have measured for the first time the material optical wall-potential of cubic boron nitride. The measurements were performed with a time-of-flight (TOF) spectrometer. The samples investigated had a wall-potential of ( 305 ± 15 ) neV . This value is in good agreement with the result extracted from neutron reflectometry data and theoretical expectations. Because of its high critical velocity for UCN and its good dielectric characteristics, cubic boron nitride coatings (isotopically enriched) will be useful for a number of applications in UCN experiments.

yearjournalcountryeditionlanguage
2009-01-11
https://publica.fraunhofer.de/handle/publica/221554