Evidence of single-photon two-site core double ionization of C 2H2 molecules

P. Lablanquie, T. P. Grozdanov, M. Aitnik, S. Carniato, P. Selles, L. Andric, J. Palaudoux, F. Penent, H. Iwayama, E. Shigemasa, Y. Hikosaka, K. Soejima, M. Nakano, I. H. Suzuki, K. Ito

Research output: Contribution to journalArticlepeer-review

72 Citations (Scopus)


We observe the formation in a single-photon transition of two core holes, each at a different carbon atom of the C2H2 molecule. At a photon energy of 770.5 eV, the probability of this 2-site core double ionization amounts to 1.6±0.4% of the 1-site core double ionization. A simple theoretical model based on the knockout mechanism gives reasonable agreement with experiment. Spectroscopy and Auger decays of the associated double core hole states are also investigated.

Original languageEnglish
Article number193004
JournalPhysical review letters
Issue number19
Publication statusPublished - 2011 Nov 4

ASJC Scopus subject areas

  • Physics and Astronomy(all)


Dive into the research topics of 'Evidence of single-photon two-site core double ionization of C 2H2 molecules'. Together they form a unique fingerprint.

Cite this