Storage-ring study of the mutual neutralization of N+ with O−

The double ion storage ring DESIREE has been used in combination with position- and time-sensitive detectors to study the mutual neutralization of N+ with O− at 40 meV collision energy. Several previously unassigned spectral features observed in a recent single-pass merged-beams experiment at 7 meV collision energy [Phys. Rev. Lett. 121, 083401 (2018)], were also observed in the present experiment. It was found that neutralization channels of the first metastable state of the cation [N+(1D),τ≈256s] could explain the majority of these features, while the second metastable state [N+(1S),τ≈0.9s] was not found to contribute significantly. The branching ratios into the different electronically excited states of N were determined and found to be in good agreement between the two experiments. Theoretical calculations using the multichannel Landau-Zener model were found to yield good results for a number of channels, but could not describe some observed contributions, possibly due to the presence of other processes not accounted for in the model.

In:Physical Review A: covering atomic, molecular, and optical physics and quantum information: American Physical Society (APS)105:62469-99262469-9934

By the author/editor: Poline, Mathias; Rosén, Stefan; Ji, MingChao; Simonsson, Ansga ...; Reinhed, Peter, ...; Larsson, Mats, 1 ...; show more...; Schmidt, Henning ...; Thomas, Richard ...; Dochain, Arnaud; Urbain, Xavier; Grumer, Jon; Barklem, Paul S.; Ard, Shaun G.; Shuman, Nicholas ...; Viggiano, Albert ...; show less...

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NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Atom and Molecul ...

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