Spectator Auger transitions of the 1s hole states in ionic sulfur compounds and molecular chlorine compounds

• Published in: Journal of electron spectroscopy and related phenomena Vol. 76; pp. 411 - 416
• Main Authors: Sasaki, Teikichi A., Baba, Yuji, Yoshii, Kenji, Yamamoto, Hiroyuki
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 29-12-1995
• ISSN: 0368-2048; 1873-2526
• DOI: 10.1016/0368-2048(95)02410-7

The Auger transitions after resonant S1s → 3p
∗ (3p
∗ indicates unoccupied states with 3p character) and C11s → 3p
∗ excitations were studied for sulfur compounds (MoS
2, Li
2SO
4 and Na
2S
2O
3) and chlorine compounds (Si(CH
3)
3Cl and SiCl
4 solidified on Cu(100) surface) by photoemission spectroscopy using synchrotron radiation. In the photon energy of the resonant excitations, the
KL
2,3
L
2,3 spectator Auger line was found to shift in two steps to higher electron energy by 2 – 10 eV in proportion to the exciting photon energy. Furthermore conspicuous splitting of the Auger line into a two-peak structure was found for Li
2SO
4, Na
2S
2O
3 and multilayered chlorine compounds. The phenomena observed for these insulators indicate that both screening effect in the decay process and broad bandlike structures of the unoccupied states play important roles in the Auger resonant Raman scattering of the incident photons.