Oscillation of the electron-density distribution in momentum space: An (e, 2e) study of H-2 at large momentum transfer

摘要

Bond oscillation, a phenomenon characteristic of the molecular electron-density distribution in momentum space, is demonstrated for the 1 sigma(g) molecular orbital of H-2 with an (e, 2e) experiment at large momentum transfer. Analysis of the experimental data in terms of two-center interference effects has revealed that different oscillatory structures can be observed, depending on the model for describing (e, 2e) ionization from the constituent H 1s atomic orbitals. It is shown that bond oscillation is highly sensitive to the spatial pattern and chemical bonding nature of the molecular orbital.