Chemical Shifts of Auger Electron Lines and Electron Binding Energies in Free Molecules. Silicon Compounds

Abstract

Chemical shifts of .Auger electron lines and electron binding energies in free molecules. Silicon compounds.

Theoretical spectroscopy on K–2, K–1L–1, and L–2 double core hole states of SiX4 (X=H, F, Cl, and CH3) molecules

“…For SiH 4 and SiF 4 , 2s À2 , 2s À1 2p À1 and 2p À2 DCH states were observed as finals states of the KL 1 L 1 , KL 1 L 23 and KL 23 L 23 Auger transitions, respectively [22,23]. For SiCl 4 , only 2p À2 DCH states were observed as final states of the KL 23 L 23 Auger transition [22]. Very recently, for SiF 4 and Si(CH 3 ) 4 , 2s À1 2p À1 and 2p À2 DCH states were observed as finals states of the KL 1 L 23 and KL 23 L 23 Auger transitions [27].…”

“…It is worth noting here that DCH states of the L À2 type can be populated as final states of KLL Auger decay in any molecules including the third row atoms (see, e.g., [22][23][24][25][26][27]). For SiH 4 and SiF 4 , 2s À2 , 2s À1 2p À1 and 2p À2 DCH states were observed as finals states of the KL 1 L 1 , KL 1 L 23 and KL 23 L 23 Auger transitions, respectively [22,23].…”

X-ray photoelectron spectroscopy for detection of the different Si–O bonding states of silicon

“…In particular, the chemical shifts in carbon C 1 s spectra derived from the different chemical environment of carbon atoms are well investigated and understood [11]. Many experimental data are also available for interpretation of Si 2p peaks of silicon bearing organic residues [12,13]. But studies discussing the chemical shift of the different bonding states of silicon in organic substances covalently bound to silica or glass surfaces are still lacking.…”

Final state effects in the photoionization process

“…The first approximation is called "relaxed potential model" (RPM) and the second where a core charge 2 + 1/2 is used to calculate the potential "transition potential model" (PM) [79,80]. From Eqs.…”