Comparative study of Si-2p core-excitation spectra in the tetrahedral molecules SiX4 (with X=H, D, F, Cl, Br, CH3)
Abstract
High-resolution Si-2p photoabsorption spectra of SiX4 molecules (X=H, D, F, Cl, Br, CH3) are presented. High-resolution spectra were obtained for SiBr4 and Si(CH3)4, and they are compared to the Si-2p spectra of the other SiX4 molecules studied before. In all cases, vibrational fine structure of the Rydberg states could be resolved, allowing a derivation of vibrational energies and intramolecular distances of the core-excited molecules from Franck-Condon analyses. The results obtained for the various ligand atoms are compared with each other, and are discussed in the context of the equivalent-cores approximation. A detailed analysis of the core-to-valence excitations in all SiX4 molecules studied is also given.
- Publication:
-
Physical Review A
- Pub Date:
- January 1998
- DOI:
- 10.1103/PhysRevA.57.297
- Bibcode:
- 1998PhRvA..57..297P
- Keywords:
-
- 33.80.Eh;
- 33.20.Rm;
- 33.20.Tp;
- 33.15.Dj;
- Autoionization photoionization and photodetachment;
- X-ray spectra;
- Vibrational analysis;
- Interatomic distances and angles