ag4d[55] [56] [57] The hybridisation of Ag4d and O2p states in the region -8.03 to -5.23 eV confirms the bonding between Ag and O atoms. Furthermore, the occurrence ofDownload scientific diagram | shows Ag4d XPS spectra measured in H 2 , N 2 , O 2 , and He. It is seen that each gas results in a different fine structure in the inelastic scattering background