Journal
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
Volume 18, Issue 1, Pages 187-194Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSTQE.2011.2107892
Keywords
Mass spectroscopy; optical pulses; photochemistry; ultrafast optics; ultraviolet sources
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Funding
- Department of Energy [DE-FG02-08ER15983, DE-PS02-08ER08-01]
- Office of Biological and Environmental Research, Pacific Northwest National Laboratory, Department of Energy
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We present the application of ultrafast time- and mass-resolved ion yield laser spectroscopy in conjunction with ab initio electronic structure calculations to track molecular excited-state dynamics. We discuss how molecular fragment ions can be associated with conformations the molecule assumes during its relaxation, and how various features of the pump-probe signal for those fragments can be used to infer details of the excited-state dynamics. We present results for radiationless relaxation in DNA and RNA bases adenine, cytosine, and uracil in the gas phase, pumped near a one-photon resonance transition to an excited state, and probed via strong-field near-IR dissociative ionization.
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