CORE-LEVEL ENERGY SPLITTING IN THE C-1S PHOTOELECTRON-SPECTRUM OF C2H2

Authors
KEMPGENS B KOPPEL H KIVIMAKI A NEEB M CEDERBAUM LS BRADSHAW AM
Citation
B. Kempgens et al., CORE-LEVEL ENERGY SPLITTING IN THE C-1S PHOTOELECTRON-SPECTRUM OF C2H2, Physical review letters, 79(19), 1997, pp. 3617-3620
Citations number
31
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
79
Issue
19
Year of publication
1997
Pages
3617 - 3620
Database
ISI
SICI code
0031-9007(1997)79:19<3617:CESITC>2.0.ZU;2-E
Abstract
The partially resolved vibrational fine structure on the C 1s photoele ctron line of C2H2 clearly differs from that of other small hydrocarbo n molecules such as CH4, C2H4, and C2H6 This is attributed to photoion ization from the two 1 sigma(g) and 1 sigma(u) core orbitals of C2H2, which can be described as the symmetric and antisymmetric linear combi nations of the C 1s orbitals. According to our analysis they are split by 105 +/- 10 meV, a result which is in good agreement with calculati on. [S0031-9007(97)04424-4].