Interference quenching of nu('')=1 vibrational line in resonant photoemission of N-2: A possibility to obtain geometrical information on the core-excited state

Research output: Contribution to journalArticle


An interference quenching of the nu"=1 vibrational line in the resonant Auger decay of N 1s-->pi(*) core-excited N-2 is observed and analyzed. The intensity ratio between the nu"=1 and nu"=0 vibrational levels of the X(2)Sigma(g)(+) final state shows a surprising nonmonotonous variation as a function of frequency detuning, going through a minimum with a complete suppression of nu"=1. We have developed a simple model which shows a linear relation between the value of the detuning frequency for this minimum and the equilibrium bond distance R-c(0) of the core-excited state. A new way is thus established of determining the equilibrium bond distance for the core-excited state with a precision deltaR(c)(0)<10(-3) Angstrom.


  • R Feifel
  • F Gel'mukhanov
  • A Baev
  • H Agren
  • MN Piancastelli
  • M Bassler
  • C Miron
  • Stacey Ristinmaa Sörensen
  • AN de Brito
  • O Bjorneholm
  • L Karlsson
  • S Svensson
External organisations
  • Uppsala University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Atom and Molecular Physics and Optics
Original languageEnglish
Article number103002
JournalPhysical Review Letters
Issue number10
Publication statusPublished - 2002
Publication categoryResearch