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Issue 16, 2019
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N2+(2Σg) and Rb(2S) in a hybrid trap: modeling ion losses from radiative association paths

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Abstract

By employing ab initio computed intermolecular potential energy surfaces we calculate the radiative association probabilities and rates for two different associative mechanisms involving trapped molecular ions N2+(2Σg) interacting either directly with ultracold Rb atoms or undergoing charge-exchange (CE) processes leading to the formation of complexes of the strongly exothermic products N2(X1Σg) plus Rb+(1S0). The two processes are expected to provide possible paths to ion losses in the trap within the timescale of experiments. The present calculations suggest that the associative rates for the ‘vibrational’ direct process are too small to be of any significant importance at the millikelvin temperatures considered in the experiments, while the ‘vibronic’ path into radiatively associating the CE products has a probability of occurring which is several orders of magnitude larger. However the reaction rate constants attributed to non-adiabatic CE [F. H. J. Hall and S. Willist, Phys. Rev. Lett., 2012, 109, 233202] are in turn several orders of magnitude larger than the radiative ones calculated here, thereby making the primary experimental process substantially unaffected by the radiative losses channel.

Graphical abstract: N2+(2Σg) and Rb(2S) in a hybrid trap: modeling ion losses from radiative association paths

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Publication details

The article was received on 31 Oct 2018, accepted on 26 Mar 2019 and first published on 28 Mar 2019


Article type: Paper
DOI: 10.1039/C8CP06761A
Citation: Phys. Chem. Chem. Phys., 2019,21, 8342-8351
  • Open access: Creative Commons BY-NC license
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    N2+(2Σg) and Rb(2S) in a hybrid trap: modeling ion losses from radiative association paths

    F. A. Gianturco, A. D. Dörfler, S. Willitsch, E. Yurtsever, T. González-Lezana and P. Villarreal, Phys. Chem. Chem. Phys., 2019, 21, 8342
    DOI: 10.1039/C8CP06761A

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