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Multiple ionization and fragmentation of the DNA base thymine by interaction with C q+ ions |
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| Authors: | J de Vries R Hoekstra R Morgenstern and T Schlathölter |
| Institution: | (1) KVI Atomic Physics, Rijksuniversiteit Groningen, Zernikelaan 25, 9747AA Groningen, The Netherlands |
| Abstract: | Ionization and fragmentation of the DNA base thymine upon interaction with keV Cq+ ions (q = 1 - 6) has been studied. By means of time-of-flight spectrometry of two or more thymine fragments in coincidence with an ejected electron we could investigate particular dissociation channels by means of their associated kinetic-energy-release. The fragmentation dynamics are strongly influenced by the Cq+ charge state: for low q values mainly fragmentation due to direct collisions is observed. With increasing q, electron capture becomes more important. For larger q we could identify several Coulomb explosion channels, leading to very energetic fragments. |
| Keywords: | 33 15 Ta Mass spectra 34 50 Gb Electronic excitation and ionization of molecules intermediate molecular states (including lifetimes state mixing etc ) 61 80 Jh Ion radiation effects 82 39 Pj Nucleic acids DNA and RNA bases 82 80 Rt Time of flight mass spectrometry |
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