Interatomic Coulombic decay following the Auger decay: Experimental evidence in rare-gas dimers

K. Ueda, H. Fukuzawa, X. J. Liu, K. Sakai, G. Prümper, Y. Morishita, N. Saito, I. H. Suzuki, K. Nagaya, H. Iwayama, M. Yao, K. Kreidi, M. Schöffler, T. Jahnke, S. Schössler, R. Dörner, Th Weber, J. Harries, Y. Tamenori

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


Interatomic Coulombic decay (ICD) in Ar2, ArKr and Kr2 following Ar 2p or Kr 3d Auger decay has been investigated by means of momentum-resolved electron-ion-ion coincidence spectroscopy. This sequential decay leads to Coulombic dissociation into dication and monocation. Simultaneously determining the kinetic energy of the ICD electron and the kinetic energy release between the two atomic ions, we have been able to unambiguously identify the ICD channels. We find that, in general, spin-conserved ICD, in which the singlet (triplet) dicationic state produced via the atomic Auger decay preferentially decays to the singlet (triplet) state, transferring the energy to the other atom, is faster than spin-flip ICD, in which the Auger final singlet (triplet) dicationic state decays to the triplet (singlet) state. However, spin-flip ICD may take place when spin-conserved ICD becomes energetically forbidden. Dipole-forbidden ICDs from K r2 + (4 s- 2 1S) - B (B = Ar or Kr) to K r2 + (4 p- 2 1D, 3P) - B+ are also observed.

Original languageEnglish
Pages (from-to)3-10
Number of pages8
JournalJournal of Electron Spectroscopy and Related Phenomena
Issue number1-3 C
Publication statusPublished - 2008 Nov
Externally publishedYes


  • Auger decay
  • Coincidence
  • Interatomic Coulombic decay
  • Rare-gas dimer

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry


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