Storage-ring study of the mutual neutralization of N+ with O-
(2022) Physical Review A — Vol. 105, n° 6, p. 62825 (2022)
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- Authors
Poline, Mathias 
Ji, MingChao Simonsson, Ansgar
- Abstract
- 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 ≈ 256 s] could explain the majority of these features, while the second metastable state [N+(1S), τ ≈ 0.9 s] 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.
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Citations
Poline, M., Rosén, S., Ji, M., Simonsson, A., Reinhed, P., Larsson, M., Schmidt, H. T., Thomas, R. D., Dochain, A., Urbain, X., Grumer, J., Barklem, P. S., Ard, S. G., Shuman, N. S., & Viggiano, A. A. (2022). Storage-ring study of the mutual neutralization of N+ with O-. Physical Review A, 105(6), 62825. https://doi.org/10.1103/physreva.105.062825 (Original work published 2022)