https://doi.org/10.1140/epjd/e2003-00117-6
Multiple ionization and fragmentation of the DNA base thymine by interaction with Cq+ ions
KVI Atomic Physics, Rijksuniversiteit Groningen, Zernikelaan 25, 9747AA Groningen, The Netherlands
Corresponding author: a tschlat@KVI.nl
Received:
10
September
2002
Published online:
3
July
2003
Ionization and fragmentation of the DNA base thymine
upon interaction with keV Cq+ ions (
) 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.
PACS: 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
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2003
