The electron impact excitation of the autoionizing states of helium, their subsequent decay into the same He+1s-1 final ionic state, and the interference of these processes have been studied. A constant ionic state (e,2e) experiment (CIS) is performed, isolating the final state by keeping the sum of the energies of the scattered- ejected electron pairs constant. The focus of this work is on the exchange interference of the 2s2(1S) and 2p2(1D) autoionizing states of helium. At around the critical energy fast variations were observed in the CIS spectra, which indicates the presence of exchange interference effects.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - Sep 7 2015|
|Event||29th International Conference on Photonic, Electronic and Atomic Collisions, ICPEAC 2015 - Toledo, Spain|
Duration: Jul 22 2015 → Jul 28 2015
ASJC Scopus subject areas
- Physics and Astronomy(all)