State-resolved mutual neutralization of 16O+ with 1H− and 2H− at collision energies below 100 meV

• We measured the product-state distribution and its dependence on the hydrogen isotope for the mutual neutralization between 16O+ and 1,2H− at the double electrostatic ion-beam storage ring DESIREE for center-of-mass collision energies below 100 meV. We find at least six product channels into ground-state hydrogen and oxygen in different excited states. The majority of oxygen products populate terms corresponding to 2⁢?22⁢?3⁢(4?∘)⁢4⁢? with 5S∘ as the main reaction product. We also observe product channels into terms corresponding to 2⁢?22⁢?3⁢(4?)⁢3⁢?. Collisions with the heavier hydrogen isotope yield a branching into these lower excited states smaller than collisions with 1H−. The observed reaction products agree with the theoretical predictions. The detailed branching fractions, however, differ between the theoretical results, and none of them fully agree with the experiment.

Subject headings

NATURVETENSKAP  -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)

Keyword

Physics

fysik

Publication and Content Type

ref (subject category)

art (subject category)