Modeling Photoassociative Spectra of Ultracold NaK + K

verfasst von
Baraa Shammout, Leon Karpa, Silke Ospelkaus, Eberhard Tiemann, Olivier Dulieu
Abstract

A model for photoassociation of ultracold atoms and molecules is presented and applied to the case of 39K and 23Na39K bosonic particles. The model relies on the assumption that photoassociation is dominated by long-range atom-molecule interactions well outside the chemical bond region. The frequency of the photoassociation laser is chosen close to a bound-bound rovibronic transition from the X1Σ+ ground state toward the metastable b3Π lowest excited state of 23Na39K, allowing us to neglect any other excitation, which could hinder the photoassociation detection. The energy level structure of the long-range 39K···23Na39K excited super-dimer is computed in the space-fixed frame by solving coupled-channel equations, involving the coupling between the 23Na39K internal rotation and the mechanical rotation of the super-dimer complex. A quite rich structure is obtained, and the corresponding photoassociation rates are presented. Other possible photoassociation transitions are discussed in the context of the proposed model.

Organisationseinheit(en)
Institut für Quantenoptik
SFB 1227: Designte Quantenzustände der Materie (DQ-mat)
Externe Organisation(en)
Universität Paris-Süd
Typ
Artikel
Journal
Journal of Physical Chemistry A
Band
127
Seiten
7872–7883
Anzahl der Seiten
12
ISSN
1089-5639
Publikationsdatum
28.09.2023
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Physikalische und Theoretische Chemie
Elektronische Version(en)
https://doi.org/10.48550/arXiv.2303.11891 (Zugang: Offen)
https://doi.org/10.1021/acs.jpca.3c01823 (Zugang: Offen)