We report an electron momentum spectroscopy study on valence shake-up satellites of neon. A symmetric noncoplanar (e,2e) experiment was performed at an incident electron energy of 1.2 keV, and the recoil-ion-momentum-dependent (e,2e) cross sections or momentum profiles of the shake-up satellites have been obtained. Furthermore, theoretical momentum profiles have been calculated on the basis of the distorted-wave Born approximation using configuration interaction wave functions of the initial neutral and final ionic states. Comparison between experiment and theory has revealed that contrary to a general expectation, electron correlation in the initial neutral state has a significant influence on the shapes of momentum profiles for neon satellites. It has been shown that the Dyson orbitals of transitions to the 2p4(S1)3sS2 and 2p4(D1)3pP2 ionic states are more localized than those of the associated primary ionizations due to electron-correlation effects.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics