Observing Femtosecond Fragmentation Using Ultrafast X-ray-Induced Auger Spectra [electronic resource].
- Washington, D.C. : United States. Dept. of Energy, 2017. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- Article numbers 681 : digital, PDF file
- Additional Creators:
- SLAC National Accelerator Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- Molecules often fragment after photoionization in the gas phase. Usually, this process can only be investigated spectroscopically as long as there exists electron correlation between the photofragments. Important parameters, like their kinetic energy after separation, cannot be investigated. We are reporting on a femtosecond time-resolved Auger electron spectroscopy study concerning the photofragmentation dynamics of thymine. We observe the appearance of clearly distinguishable signatures from thymine's neutral photofragment isocyanic acid. Furthermore, we observe a time-dependent shift of its spectrum, which we can attribute to the influence of the charged fragment on the Auger electron. This allows us to map our time-dependent dataset onto the fragmentation coordinate. The time dependence of the shift supports efficient transformation of the excess energy gained from photoionization into kinetic energy of the fragments. Our method is broadly applicable to the investigation of photofragmentation processes.
- Published through SciTech Connect., 07/01/2017., ": app7070681", Applied Sciences 7 7 ISSN 2076-3417; ASPCC7 AM, and Thomas Wolf; Fabian Holzmeier; Isabella Wagner; Nora Berrah; Christoph Bostedt; John Bozek; Phil Bucksbaum; Ryan Coffee; James Cryan; Joe Farrell; Raimund Feifel; Todd Martinez; Brian McFarland; Melanie Mucke; Saikat Nandi; Francesco Tarantelli; Ingo Fischer; Markus Gühr.
- Funding Information:
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