A M Sayler et al 2006 J. Phys. B: At. Mol. Opt. Phys. 39 1701 doi:10.1088/0953-4075/39/7/012
A M Sayler, M Leonard, K D Carnes, R Cabrera-Trujillo, B D Esry and I Ben-Itzhak
Show affiliationsMeasurements of the fragmentation of deuterium tagged water molecules, namely HDO, by fast proton and F7+ impact exhibit a very strong isotopic preference for cleavage of the OH bond over the OD bond. Explicitly, the former is about five times more likely than the latter for HDO2+ dissociation. HDO+ exhibits similar behaviour, though the asymmetry is smaller at about a factor of 2. Wave-packet propagation calculations are in good agreement with the measured branching ratio for HDO2+ dissociation.
33.15.Fm Bond strengths, dissociation energies
82.30.Fi Ion-molecule, ion-ion, and charge-transfer reactions
34.80.Gs Molecular excitation and ionization
82.30.Lp Decomposition reactions (pyrolysis, dissociation, and fragmentation)
Issue 7 (14 April 2006)
Received 20 September 2005, in final form 9 February 2006
Published 20 March 2006
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