Phys. Rev. A 101, 012706 (2020) - Rotational-state-changing collisions between ${\mathrm{N}}_{2}^{+}$ and Rb at low energies

Rotational-state-changing collisions between $N_{2}^{+}$ and Rb at low energies

A. D. Dörfler, E. Yurtsever, P. Villarreal, T. González-Lezana, F. A. Gianturco, and S. Willitsch

Phys. Rev. A 101, 012706 – Published 16 January 2020

Abstract

We present a theoretical study of rotationally elastic and inelastic collisions between molecular nitrogen ions and Rb atoms in the sub-Kelvin temperature regime prevalent in ion-atom hybrid trapping experiments. The cross sections for rotational excitation and de-excitation collisions were calculated using quantum-scattering methods on ab initio potential energy surfaces for the energetically lowest singlet electronic channel of the system. We find that the rotationally inelastic collision rates are at least an order of magnitude smaller than the charge-exchange rates found in this system, rendering inelastic processes a minor channel under the conditions of typical hybrid trapping experiments.

Received 25 October 2019

DOI:https://doi.org/10.1103/PhysRevA.101.012706

©2020 American Physical Society

Physics Subject Headings (PhySH)

Atom & ion cooling Charge-transfer collisions Interatomic & molecular potentials Long-range interactions Potential energy surfaces Scattering theory Ultracold collisions

Atomic, Molecular & Optical

Authors & Affiliations

Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland

Department of Chemistry, Koç University, Rumelifeneriyolu, Sariyer, TR-34450, Istanbul, Turkey

P. Villarreal and T. González-Lezana ⁴

Instituto de Física Fundamental IFF-CSIC, Consejo Superior de Investigaciones Científicas, Serrano 123, E-28006 Madrid, Spain

F. A. Gianturco^*

Institut für Ionen Physik und Angewandte Physik, Leopold Franzens-Universität, Technikerstrasse 25, A-6020, Innsbruck, Austria

S. Willitsch ^†

Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland

^*francesco.gianturco@uibk.ac.at
^†stefan.willitsch@unibas.ch

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Issue

Vol. 101, Iss. 1 — January 2020

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