SAMOP 2023 – wissenschaftliches Programm
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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.