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MO: Fachverband Molekülphysik

MO 1: Cold Molecules (joint session MO/Q)

MO 1.8: Vortrag

Montag, 6. März 2023, 12:45–13:00, F102

Theoretical study of photoassociation of ultracold ²³Na³⁹K and ³⁹K — •Baraa Shammout¹, Charbel Karam², Leon Karpa¹, Eberhard Tiemann¹, Silke Ospelkaus¹, and Olivier Dulieu² — ¹Institut für Quantenoptik, Universität Hannover — ²Université Paris-Saclay, CNRS, Laboratoire Aimé Cotton

Understanding the physics underlying ultracold alkali atom-diatom collisions is essential for full quantum control on ultracold molecules. The long-range photoassociation (PA) process of loosely-bound ultracold trimers from a scattering state of atom-diatom is a possible pathway to investigate their collisional properties. In this work, we present a long-range model for modeling photoassociation of ultracold ²³Na³⁹K and ³⁹K close to the molecular resonant excitation NaK(X¹Σ) → NaK(b³Π). We have calculated potential energy surfaces (PESs) for the low-lying doublet excited states of NaK₂ up to the NaK(b³Π)+K(4s) dissociation limit. We extracted the energy of vibrational-rotational levels using the time-independent close-coupling method, restricted to the long-range PESs. Finally, we demonstrate the possibility of experimental observation of trimer photoassociation by estimating trimer PA-rates.