Journal article

Authors list: Kalosi, Abel; Grieser, Manfred; Isberner, Leonard W.; Kreckel, Holger; Larson, Asa; Neufeld, David A.; Orel, Ann E.; Paul, Daniel; Savin, Daniel W.; Schippers, Stefan; Schmidt, Viviane C.; Wolf, Andreas; Wolfire, Mark G.; Novotny, Oldrich

Publication year: 2024

Journal: Physical review A

Volume number: 110

Issue number: 2

ISSN: 2469-9926

eISSN: 2469-9934

Open access status: Hybrid

DOI Link: https://doi.org/10.1103/PhysRevA.110.022816

Publisher: American Physical Society

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.

Harvard Citation style: Kalosi, A., Grieser, M., Isberner, L., Kreckel, H., Larson, A., Neufeld, D., et al. (2024) Dissociative recombination of rotationally cold ArH+, Physical review A, 110(2), Article 022816. https://doi.org/10.1103/PhysRevA.110.022816

APA Citation style: Kalosi, A., Grieser, M., Isberner, L., Kreckel, H., Larson, A., Neufeld, D., Orel, A., Paul, D., Savin, D., Schippers, S., Schmidt, V., Wolf, A., Wolfire, M., & Novotny, O. (2024). Dissociative recombination of rotationally cold ArH+. Physical review A. 110(2), Article 022816. https://doi.org/10.1103/PhysRevA.110.022816