Dissociative recombination study of Na+(D2O) in a storage ring

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Abstract
The dissociative recombination of Na + ( D 2 O ) ion has been studied at the heavy-ion storage ring CRYRING (Manne Siegbahn Laboratory, Stockholm University). The cross section has been measured as a function of center-of-mass energy ranging from 1 meV to 0.1 eV and found to have an E −1.37 dependence. The rate coefficient has been deduced to be (2.3±0.32)×10 −7 (T e /300) −0.95±0.01 cm 3 s −1 for T e =50–1000 K . The branching ratios have been measured at 0 eV. Of the four energetically accessible dissociation channels, three channels are found to occur although the channel that breaks the weak Na + – D 2 O bond is by far dominant.