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Inception of electronic damage of matter by photon-driven post-ionization mechanisms
Polish Acad Sci, Inst Phys Chem, PL-01224 Warsaw, Poland.
Phys Tech Bundesanstalt, D-10587 Berlin, Germany.
Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för kemi - Ångström, Teoretisk kemi.
Vise andre og tillknytning
2019 (engelsk)Inngår i: Structural Dynamics, ISSN 2329-7778, Vol. 6, nr 2, artikkel-id 024901Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

"Probe-before-destroy" methodology permitted diffraction and imaging measurements of intact specimens using ultrabright but highly destructive X-ray free-electron laser (XFEL) pulses. The methodology takes advantage of XFEL pulses ultrashort duration to outrun the destructive nature of the X-rays. Atomic movement, generally on the order of >50 fs, regulates the maximum pulse duration for intact specimen measurements. In this contribution, we report the electronic structure damage of a molecule with ultrashort X-ray pulses under preservation of the atoms' positions. A detailed investigation of the X-ray induced processes revealed that X-ray absorption events in the solvent produce a significant number of solvated electrons within attosecond and femtosecond timescales that are capable of coulombic interactions with the probed molecules. The presented findings show a strong influence on the experimental spectra coming from ionization of the probed atoms' surroundings leading to electronic structure modification much faster than direct absorption of photons. This work calls for consideration of this phenomenon in cases focused on samples embedded in, e.g., solutions or in matrices, which in fact concerns most of the experimental studies.

sted, utgiver, år, opplag, sider
2019. Vol. 6, nr 2, artikkel-id 024901
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URN: urn:nbn:se:uu:diva-383884DOI: 10.1063/1.5090332ISI: 000466710000011PubMedID: 31041363OAI: oai:DiVA.org:uu-383884DiVA, id: diva2:1319051
Forskningsfinansiär
Knut and Alice Wallenberg Foundation, KAW-2013.0020Tilgjengelig fra: 2019-05-29 Laget: 2019-05-29 Sist oppdatert: 2019-05-29bibliografisk kontrollert

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