Journal
PHYSICAL REVIEW LETTERS
Volume 113, Issue 15, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.113.153002
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Funding
- Advanced Study Group of the Max Planck Society
- Max Planck Institute of Biophysical Chemistry
- Volkswagen Stiftung
- Helmholtz Virtual Institute Dynamic Pathways in Multidimensional Landscapes
- Department of Energy through the SLAC Laboratory Directed Research and Development Program
- Collaborative Research Center [SFB 755, SFB 1073]
- AMOS program within the Chemical Sciences, Geosciences, and Biosciences Division of the Office of Basic Energy Sciences
- LCLS
- Stanford University through the Stanford Institute for Materials Energy Sciences (SIMES)
- Lawrence Berkeley National Laboratory (LBNL)
- University of Hamburg through the BMBF priority Program [FSP 301]
- Center for Free Electron Laser Science (CFEL)
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We report on oxygen K-edge soft x-ray emission spectroscopy from a liquid water jet at the Linac Coherent Light Source. We observe significant changes in the spectral content when tuning over a wide range of incident x-ray fluences. In addition the total emission yield decreases at high fluences. These modifications result from reabsorption of x-ray emission by valence-excited molecules generated by the Auger cascade. Our observations have major implications for future x-ray emission studies at intense x-ray sources. We highlight the importance of the x-ray pulse length with respect to the core-hole lifetime.
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