A detailed description of our molecule-surface scattering apparatus has been provided in our previous work and only a concise description is presented here. It consists of a source chamber and two differential pumping stages (Diff-1 and Diff-2) followed by a UHV chamber where the Cu(110) target single crystal was placed. The Cu(110) single crystal (disk-shaped, 10 mm diameter and 2 mm thickness) is specified to be 99.9999% pure, cut within a precision of 0.1 degrees, and polished to a roughness below 10 nm (MaTeck Material Technologie and Kristalle GmbH). It was mounted on a four-axis (XYZθ) differentially pumped manipulator using 0.25 mm diameter tungsten wires.