Near-ultraviolet luminescence of N2 irradiated by short x-ray pulses

Stefan P. Hau-Riege, Richard M. Bionta, Dmitri D. Ryutov, Richard A. London, Elden Ables, Keith I. Kishiyama, Stewart Shen, Mark A. McKernan, Donn H. McMahon, Marc Messerschmidt, Jacek Krzywinski, Peter Stefan, James Turner, Beata Ziaja

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


The Linac Coherent Light Source is an x-ray free-electron laser that recently demonstrated lasing in the 1.5-15 Å wavelength range. We report on luminescence measurements of a molecular nitrogen gas irradiated by ∼2mJ, 80 fs x-ray pulses at energies of 0.83, 2.7, and 8.3 keV. These results provide a direct test of our current understanding of photoabsorption, electron dynamics, and fluorescence processes for such intense, ultrashort x-ray pulses. At 0.83 keV, the duration of the fluorescence signal depends strongly on space-charge effects. At 8.3 keV, space-charge effects are weak, and the signal duration is determined by the Auger electron dynamics.

Original languageEnglish (US)
Article number043003
JournalPhysical Review Letters
Issue number4
StatePublished - Jul 23 2010
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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