Localized versus delocalized excitations just above the 3d threshold in krypton clusters studied by Auger electron spectroscopy

Summary, in English

We present Auger spectroscopy studies of large krypton clusters excited by soft x-ray photons with energies on and just above the 3d(5/2) 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. (C) 2007 American Institute of Physics.

• Author: Maxim Tchaplyguine; A Kivimäki; Sergey Peredkov; Stacey Ristinmaa Sörensen; Aldana Rosso; Gunnar Öhrwall; J Schulz; M Lundwall; Olle Björneholm; N. Mårtensson; T. Rander; Andreas Lindblad
• Department/s: MAX IV Laboratory; Synchrotron Radiation Research
• Publishing year: 2007
• Language: English
• Publication/Series: Journal of Chemical Physics
• Volume: 127
• Issue: 12
• Links: http://dx.doi.org/10.1063/1.2770460
• Document type: Journal article
• Publisher: American Institute of Physics (AIP)
• Topic: Atom and Molecular Physics and Optics
• Status: Published
• Research group: Synch Rad Res
• ISBN/ISSN/Other: ISSN: 0021-9606