Physics – Atomic Physics
Scientific paper
2011-03-28
J. Electron Spectroscopy and Related Phenomena 183,48-52 (2011)
Physics
Atomic Physics
8 pages, 2 figures
Scientific paper
We have measured the molecular frame angular distributions of photoelectrons emitted from the Carbon K shell of fixed-in-space CO molecules for the case of simultaneous excitation of the remaining molecular ion. Normal and conjugate shake up states are observed. Photo electrons belonging to normal \Sigma -satellite lines show an angular distribution resembling that observed for the main photoline at the same electron energy. Surprisingly a similar shape is found for conjugate shake up states with \Pi -symmetry. In our data we identify shake rather than electron scattering (PEVE) as the mechanism producing the conjugate lines. The angular distributions clearly show the presence of a \Sigma -shape resonance for all of the satellite lines.
Alnaser A.
Arnold Walter
Benis E. P.
Czasch Achim
Dörner Ross
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