Localized versus delocalized excitations just above the 3d threshold in krypton clusters studied by Auger electron spectroscopy
2007 (English)In: Journal of Chemical Physics, ISSN 0021-9606, E-ISSN 1089-7690, Vol. 127, no 12, 124314- p.Article in journal (Refereed) Published
We present Auger spectroscopy studies of large krypton clusters excited by soft x-ray photons with energies on and just above the 3d(52) ionization threshold. The deexcitation spectra contain new features as compared to the spectra measured both below and far above threshold. Possible origins of these extra features, which stay at constant kinetic energies, are discussed: (1) normal Auger process with a postcollision interaction induced energy shift, (2) recapture of photoelectrons into high Rydberg orbitals after Auger decay, and (3) excitation into the conduction band (or "internal" ionization) followed by Auger decay. The first two schemes are ruled out, hence internal ionization remains the most probable explanation.
Place, publisher, year, edition, pages
2007. Vol. 127, no 12, 124314- p.
atomic clusters, Auger electron spectra, krypton, Penning ionisation, Rydberg states
IdentifiersURN: urn:nbn:se:uu:diva-16366DOI: 10.1063/1.2770460ISI: 000249787300026OAI: oai:DiVA.org:uu-16366DiVA: diva2:44137