Storage of ultracold neutrons in high resistivity, non-magnetic materials withhigh Fermi potential

摘要

We report the use of deuterated polystyrene (dPS) and deuterated polyethylene (dPE) for the storage ofultracold neutrons (UCN) in an experiment to search for a finite neutron electric dipole moment(nEDM). The Fermi potential of thin film coatings on silicon was measured by cold neutronreflectometry as V(dPS) (161710) neV and V(dPE) (214710) neV. The UCN loss factor at roomtemperature of a dPS-coated polystyrene insulator is Z (371)04.