Electronic Doppler effect in resonant Auger decay of CO molecules upon excitation near a shake-up Pi resonance
2007 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 76, no 062704Article in journal (Refereed) Published
Wepresent an experimental observation of the electronic Doppler effect inresonant Auger spectra upon core excitation slightly above the carbonK edge of the CO molecule. Thus the electronic Dopplereffect has been identified in above-threshold excitation, and in atransition of symmetry. Ab initio calculations of the potentialenergy curves of the relevant states of CO and thewave packet technique have been employed to provide a theoreticalbackground to the experimental studies. The weak feature around 299.4 eVin the photoabsorption spectrum, whose decay has been investigated bythe present experiment, is assigned to double (core-valence) excitations toC 1s shake-up states |1s1−1*2 with a strong dissociative character,and the Doppler splitting of the atomic peak has beenreproduced by the simulation.
Place, publisher, year, edition, pages
APS , 2007. Vol. 76, no 062704
ray raman-scattering, photochemistry beamline bl27su, excited-states, shell, photoemission, radiation, dynamics, autoionization, dissociation, spectroscopy
IdentifiersURN: urn:nbn:se:kth:diva-9733DOI: 10.1103/PhysRevA.76.062704ISI: 000251985900062ScopusID: 2-s2.0-37249052816OAI: oai:DiVA.org:kth-9733DiVA: diva2:127306
Uppdaterad från manuskript till artikel: 20100910 QC 201009102008-12-042008-12-042016-05-18Bibliographically approved