Abstract
Reaction dynamics of sodium cluster ions, Na + n (n = 2–9), in collision with molecular oxygen, O2 was investigated by measuring the absolute dissociation cross sections and the branching fractions by using a tandem mass spectrometer equipped with several octapole ion guides. The mass spectrum of the product ions show that the dominant reaction channels are production of oxide ions, NakOi (i =1, 2), and intact ions, Na +p (p < n). With increase in the collision energy, the cross section for the production of the oxide ions decreased, while that for the production of the intact ions increased. The collision-energy dependences of the cross section for the oxide formation reveals that electron harpooning from the molecule to Na +n preludes the oxideion formation. On the other hand, the collision-energy dependences of the cross sections for the intact ion formation is explained by a hard-sphere-collision model similar to the collisional dissociation of Na +n by rare-gas impact.
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Nonose, S., Tanaka, H., Mizuno, T. et al. Reaction dynamics of Na +n in collision with molecular oxygen. Z Phys D - Atoms, Molecules and Clusters 40, 75–77 (1997). https://doi.org/10.1007/s004600050161
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DOI: https://doi.org/10.1007/s004600050161