Reabsorption of soft x-ray emission at high x-ray free-electron laser fluences.

Schreck, S.; Beye, M.; Sellberg, J. A.; McQueen, T.; Laksmono, H.; Kennedy, B.; Eckert, S.; Schlesinger, D.; Nordlund, D.; Ogasawara, H.; Sierra, R. G.; Segtnan, V. H.; Kubicek, K.; Schlotter, W. F.; Dakovski, G. L.; Moeller, S. P.; Bergmann, U.; Techert, S.; Pettersson, L. G. M.; Wernet, P.; Bogan, M. J.; Harada, Y.; Nilsson, A.; Föhlisch, A.

doi:10.1103/PhysRevLett.113.153002

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Reabsorption of soft x-ray emission at high x-ray free-electron laser fluences.

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Kubicek, K.
Research Group of Structural Dynamics of (Bio)chemical Systems, MPI for biophysical chemistry, Max Planck Society;

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Techert, S.
Research Group of Structural Dynamics of (Bio)chemical Systems, MPI for biophysical chemistry, Max Planck Society;

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Citation

Schreck, S., Beye, M., Sellberg, J. A., McQueen, T., Laksmono, H., Kennedy, B., et al. (2014). Reabsorption of soft x-ray emission at high x-ray free-electron laser fluences. Physical Review Letters, 113(15): 153002. doi:10.1103/PhysRevLett.113.153002.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0023-C3C6-6

Abstract

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. At high fluences, also the total emission yield decreases. 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.