6533b85ffe1ef96bd12c1921

RESEARCH PRODUCT

Direct Experimental Verification of Neutron Acceleration by the Material Optical Potential of SolidH22

J. V. KratzM. MeierA. FreiAndreas KnechtI. AltarevT. LauerM. DaumF. J. HartmannY. SobolevErwin GutsmiedlSoumen PaulWerner HeilNorbert WiehlF. AtchisonG. Hampel

subject

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

description

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, ${E}_{c}=106\text{ }\text{ }\mathrm{neV}$.

https://doi.org/10.1103/physrevlett.100.014801