Reabsorption of Soft X-Ray Emission at High X-Ray Free-Electron Laser Fluences
2014 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 113, no 15, 153002- p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2014. Vol. 113, no 15, 153002- p.
IdentifiersURN: urn:nbn:se:su:diva-110198DOI: 10.1103/PhysRevLett.113.153002ISI: 000344245600005OAI: oai:DiVA.org:su-110198DiVA: diva2:769967