(e,2e) coincidence study on the coherence of the 2s2(1S) and 2p2(1D) autoionizing states of He

B. Paripás, B. Palásthy, K. Tökési

Research output: Contribution to journalConference article


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.

Original languageEnglish
Article number052077
JournalJournal of Physics: Conference Series
Issue number5
Publication statusPublished - Sep 7 2015
Event29th International Conference on Photonic, Electronic and Atomic Collisions, ICPEAC 2015 - Toledo, Spain
Duration: Jul 22 2015Jul 28 2015


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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