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Wavelength-dependent photodissociation of iodomethylbutane

Journal Article · · Scientific Reports
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  1. Universität Hamburg (Germany); Universität Kassel (Germany); European XFEL, Schenefeld (Germany)
  2. SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Photon Ultrafast Laser Science and Engineering Institute (PULSE); Univ. of Oxford (United Kingdom)
  3. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Center for Free-Electron Laser Science
  4. Universität Kassel (Germany); European XFEL, Schenefeld (Germany)
  5. European XFEL, Schenefeld (Germany)
  6. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  7. University of Oxford (United Kingdom)
  8. Universität Kassel (Germany)
  9. Stockholm University (Sweden)
  10. University of Oxford (United Kingdom); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  11. Peking University, Beijing (China); Shanxi University, Taiyuan (China)
  12. Kansas State University, Manhattan, KS (United States)
  13. Max Born Institute, Berlin (Germany)
  14. University of Gothenburg (Sweden)
  15. Universität Hamburg (Germany); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); TAU Systems, Austin, TX (United States)
  16. Universität Hamburg (Germany); Universität Kassel (Germany); European XFEL, Schenefeld (Germany); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
+ Show Author Affiliations

Ultrashort XUV pulses of the Free-Electron-LASer in Hamburg (FLASH) were used to investigate laser-induced fragmentation patterns of the prototypical chiral molecule 1-iodo-2-methyl-butane (C5 H11I) in a pump-probe scheme. Ion velocity-map images and mass spectra of optical-laser-induced fragmentation were obtained for subsequent FEL exposure with photon energies of 63 eV and 75 eV. These energies specifically address the iodine 4d edge of neutral and singly charged iodine, respectively. The presented ion spectra for two optical pump-laser wavelengths, i.e., 800 nm and 267 nm, reveal substantially different cationic fragment yields in dependence on the wavelength and intensity. For the case of 800-nm-initiated fragmentation, the molecule dissociates notably slower than for the 267 nm pump. The results underscore the importance of considering optical-laser wavelength and intensity in the dissociation dynamics of this prototypical chiral molecule that is a promising candidate for future studies of its asymmetric nature.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); Peter-Paul-Ewald Fellowship; Engineering and Physical Sciences Research Council (EPSRC); Federal Ministry of Education and Research (BMBF); National Natural Science Foundation of China (NSFC); Swedish Research Council (VR)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
2575159
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 15; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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