Interstitial Hydrogen in Superstructures: Lattice Site Location and Thermal Vibration

Abstract

We report real space location of hydrogen in single crystalline superstructures. Anisotropic strain is quantified versus hydrogen concentration by using the yield of backscattered primary 2 MeV ions for incidence in different crystallographic directions. From a comparison of ion channeling in combination with nuclear reaction analysis and Monte Carlo simulations we show that hydrogen is located in octahedral sites and quantify its vibrational amplitude of 0.2 Å.