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- Kukk, E.University of Turku (author)
Formative period in the x-ray-induced photodissociation of organic molecules
- Article/chapterEnglish2021
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- 2021
- 12 s.
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- LIBRIS-ID:oai:lup.lub.lu.se:b4f2970f-922b-48d5-9406-7750562f2d77
- https://lup.lub.lu.se/record/b4f2970f-922b-48d5-9406-7750562f2d77URI
- https://doi.org/10.1103/PhysRevResearch.3.013221DOI
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- Language:English
- Summary in:English
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- Absorption of x-ray photons by atomic inner shells of light-element organics and biomolecules often leads to formation of dicationic electronic states and to molecular fragmentation. We investigated the x-ray-induced dissociation landscape of a representative medium-sized organic molecule, thiophene, by femtosecond x-ray pulses from the Super Photon Ring-8 GeV (SPring-8) Angstrom Compact Free-Electron Laser (SACLA). Holes, created in the sulfur 2p orbital by photoemission, were filled by the Auger process that created dicationic molecular states within a broad range of internal energies—a starting point particular to x-ray-induced dynamics. The evolution of the ionized molecules was monitored by a pump-probe experiment using a near-infrared (800 nm) laser pulse. Ion-ion coincidence and ion momentum analysis reveals enhanced yields of ionic fragments from multibody breakup of the ring, attributed to additional ionization of the highly excited fraction of the dicationic parent molecular states. The transient nature of the enhancement and its decay with about a 160-fs time constant indicate formation of an open-ring parent geometry and the statistical survival time of the parent species before the dissociation events. By probing specific Auger final states of transient, highly excited nature by near-infrared light, we demonstrate how pump-probe signatures can be related to the key features in dynamics during the early period of the x-ray-induced damage of organic molecules and biomolecules.
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- Fukuzawa, H.Tohoku University,RIKEN SPring-8 center (author)
- Niskanen, J.University of Turku (author)
- Nagaya, K.Kyoto University (author)
- Kooser, K.University of Turku,University of Tartu (author)
- You, D.Tohoku University (author)
- Peschel, J.Lund University,Lunds universitet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)ja7503pe (author)
- Maclot, S.Lund University,Lunds universitet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)fysi-sam (author)
- Niozu, A.Kyoto University (author)
- Saito, S.Tohoku University (author)
- Luo, Y.Tohoku University (author)
- Pelimanni, E.University of Oulu (author)
- Itälä, E.University of Turku (author)
- Bozek, J. D.Synchrotron SOLEIL (author)
- Takanashi, TTohoku University (author)
- Berholts, M.Synchrotron SOLEIL,University of Tartu (author)
- Johnsson, P.Lund University,Lunds universitet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)fysi-pj0 (author)
- Ueda, K.Tohoku University,RIKEN SPring-8 center (author)
- University of TurkuTohoku University (creator_code:org_t)
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- Peschel, J.
- Maclot, S.
- Niozu, A.
- Saito, S.
- Luo, Y.
- Pelimanni, E.
- Itälä, E.
- Bozek, J. D.
- Takanashi, T
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