Identification of the weak features in N 1s near-edge X-ray absorption fine structure of N2O multilayer

The multiple-scattering cluster method has been employed to calculate N 1s near-edge X-ray absorption fine structure (NEXAFS) of N2O single molecule and N2O multilayer. It has been shown that the complicated weak features in the NEXAFS of N2O multilayer are attributed to four σ resonances and two weak features. Two weak features are attributed to the interaction between N2O molecular layers. The result of the self-consistent field (SCF) DV-Xα calculation of N2O multilayer has confirmed above conclusion. The analysis of N2O numbers in molecular chain shows the feature σ1 is weakened due to the interaction between the intermediate photoelectron and the potential of the ionic molecules.