Dissociative Recombination of NeH+ with Low-Energy Electrons: A Multichannel Quantum Defect Theory Approach Including Non-Adiabatic Couplings

We present a theoretical study of the dissociative recombination (DR) of NeH+ with low-energy electrons, using Multichannel Quantum Defect Theory (MQDT). In contrast to typical DR processes driven by Rydberg-valence interactions, our approach focuses on the non-adiabatic couplings between molecular states. This study addresses a significant gap in the available theoretical data at low energies (<2 eV), where no detailed quantum calculations have been performed. The resulting cross-sections exhibit good agreement with experimental results, providing new insights into the DR process. Our findings have some implications for fusion edge plasmas and may also be relevant for astrochemistry.