2024 Volume 22 Issue 3 Pages 188-193
Two factors have hindered the extraction of surface structural information by repulsive desorption of hyperthermal products. The first is associated with non-angle resolved (AR) desorption analyses, especially non-AR-resonance-enhanced multiphoton ionization combined with time-of-flight. This ignores the anisotropy of desorption that conveys structural information and overlooks the coupling of rotational and translational modes in repulsive desorption, leading to an overestimation of the translational energy of high rotational energy states. Second, the detailed balance principle has been incorrectly used in desorption dynamics, leading to a mixing of adsorption and desorption dynamics and obscuring the energy transfer to each mode of desorbed products. Based on these considerations, a new partitioning of energy is proposed for the associative D2 desorption on Cu(111).
