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The multielectron character of the S 2p → 4eg shape resonance in the SF6 molecule studied via detection of soft X-ray emission and neutral high-Rydberg fragments

Författare

  • A. Kivimäki
  • M. Coreno
  • P. Miotti
  • F. Frassetto
  • L. Poletto
  • C. Stråhlman
  • M. De Simone
  • R. Richter

Summary, in English

We have studied the nature of the S 2p → 4eg shape resonance in the SF6 molecule by performing two different experiments. Soft X-ray emission spectra measured at the 4eg shape resonance reveal features that do not originate from the S 2p-1 states. One of the features can be assigned to the 6a1g → S 2p transition. The 6a1g orbital, which is empty in the molecular ground state, can be populated either in core-valence double excitations or in S 2p shake-up transitions. Both these channels are considered. We have also studied the fragmentation of SF6 molecule after the decay of the S 2p core-hole states by observing neutral fragments in high-Rydberg states, where an electron occupies an orbital with n ≥ 20 (n is the principal quantum number). Such neutral fragments become, in relative terms, more abundant at the S 2p → 4eg shape resonance with respect to the S 2p → 2t2g shape resonance, which is a pure one-electron phenomenon.

Publiceringsår

2016-05-01

Språk

Engelska

Sidor

26-33

Publikation/Tidskrift/Serie

Journal of Electron Spectroscopy and Related Phenomena

Volym

209

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Atom and Molecular Physics and Optics

Nyckelord

  • Double excitations
  • High-Rydberg states
  • SF
  • Shake-up transitions
  • Shape resonance
  • Soft X-ray emission

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0368-2048