Dissociative recombination of rotationally cold ArH+

Kálosi, Ábel; Grieser, Manfred; Isberner, Leonard W.; Kreckel, Holger; Larson, Åsa; Neufeld, David A.; Orel, Ann E.; Paul, Daniel; Savin, Daniel W.; Schippers, Stefan; Schmidt, Viviane C.; Wolf, Andreas; Wolfire, Mark G.; Novotný, Oldřich

doi:10.1103/PhysRevA.110.022816

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Dissociative recombination of rotationally cold ArH⁺

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Kálosi, Ábel
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Grieser, Manfred
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Isberner, Leonard W.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Kreckel, Holger
Holger Kreckel, ASTROLAB - MPG-Gruppe im Anschluss an ERC Starting Grant, MPI for Nuclear Physics, Max Planck Society;

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Paul, Daniel
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Schmidt, Viviane C.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Wolf, Andreas
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Novotný, Oldřich
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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https://journals.aps.org/pra/pdf/10.1103/PhysRevA.110.022816
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Citation

Kálosi, Á., Grieser, M., Isberner, L. W., Kreckel, H., Larson, Å., Neufeld, D. A., et al. (2024). Dissociative recombination of rotationally cold ArH⁺. Physical Review A, 110(2): 022816. doi:10.1103/PhysRevA.110.022816.

Cite as: https://hdl.handle.net/21.11116/0000-000F-CC43-0

Abstract

We have experimentally studied dissociative recombination (DR) of electronically and vibrationally relaxed ArH⁺ in its lowest rotational levels, using an electron-ion merged-beams setup at the Cryogenic Storage Ring. We report measurements for the merged-beams rate coefficient of ArH⁺ and compare it to published experimental and theoretical results. In addition, by measuring the kinetic energy released to the DR fragments, we have determined the internal state of the DR products after dissociation. At low collision energies, we find that the atomic products are in their respective ground states, which are only accessible via nonadiabatic couplings to neutral Rydberg states. Published theoretical results for ArH⁺ have not included this DR pathway. From our measurements, we have also derived a kinetic temperature rate coefficient for use in astrochemical models.