Direct time resolved observation of molecular dynamics induced by soft-x-ray photoionization

A. S. Sandhu, E. Gagnon, P. Ranitovic, X. M. Tong, C. L. Cocke, M. M. Murnane, H. C. Kapteyn

Research output: Contribution to journalArticlepeer-review


We report the first direct observation of ultrafast dynamics in molecules induced by ionizing radiation. We use high harmonic upconversion process to generate soft-x-ray pulses of few femtoseconds duration, which photoionize N2 molecule. This leads to the formation of highly excited N 2+ ions via inner-shell ionization and electron shakeup processes. We time resolve the unexplored fragmentation dynamics of the electron shakeup states with femtosecond resolution using a strong-field IR probe. The IR pulse promotes the dissociating N2+ wavepacket to repulsive N22+ potential. We obtain kinetic energy release of N+/N+ channel as function of time delay and observe a rapid transition from spherically-symmetric molecular potential to a two-center potential within ∼150 fs.

Original languageEnglish (US)
Article number012037
JournalJournal of Physics: Conference Series
Issue number1
StatePublished - Nov 1 2007

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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