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Ultracold charged atom-dimer collisions: State-selective charge exchange and three-body recombination

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Author(s):
Pandey, A. ; Vexiau, R. ; Marcassa, L. G. ; Dulieu, O. ; Bouloufa-Maafa, N.
Total Authors: 5
Document type: Journal article
Source: PHYSICAL REVIEW RESEARCH; v. 6, n. 4, p. 12-pg., 2024-10-04.
Abstract

Based on an accurate determination of the potential energy surfaces of Rb+ 3 correlated to its first asymptotic limit Rb+ + Rb(5s) + Rb(5s), we identify the presence of intersections of a pair of singlet and triplet surfaces over all interparticle distances, leading to Jahn-Teller (JT) couplings. We elaborate scenarios for charge exchange between ultracold charged atom-dimer complex (Rb + Rb+ 2 or Rb+ + Rb2), predicting a strong selectivity on the preparation of the initial state of the dimer. We also demonstrate that the JT couplings must drive the threebody recombination (TBR) of Rb+, Rb, and Rb at ultracold energies. Using the current analysis, we provide a consistent picture of the TBR experiments performed in ion-atom hybrid Rb samples. We also demonstrate the presence of JT coupling as a general phenomenon in the singly charged homonuclear alkali triatomic systems. (AU)

FAPESP's process: 21/04107-0 - Collisions in a Cold Trapped Molecular Sample in a well-defined quantum state: COCOTRAMOS
Grantee:Luis Gustavo Marcassa
Support Opportunities: Research Projects - Thematic Grants