Critical Bonding in Positive Homonuclear Diatomic Molecular Ions

摘要

Bonding in homonuclear diatoms with positive excess charge is considered. Focusing mainly onto two-electron systems, we analyze the explanation of barrier formation by avoided crossings of potential energy curves, and replace it by a description yielding a universal scenario for transitions from stable to metastable and unstable bonds in isoelectronic systems.