Neutron-Spectroscopic Evidence for Hydrogen Tunneling States in Niobium

Abstract

Inelastic neutron scattering measurements demonstrating H tunneling states for O-H pairs in Nb${\mathrm{O}}_{0.013}$${\mathrm{H}}_{0.016}$ are presented. The tunneling matrix element found is 0.19\ifmmode\pm\else\textpm\fi{}0.04 meV.