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A: Fachverband Atomphysik

A 6: Atomic clusters (joint session A/MO)

A 6.4: Vortrag

Montag, 9. März 2020, 15:15–15:30, a320

Solvation and desorption dynamics of Cs atoms attached to He nanodroplets — •Nicolas Rendler, Audrey Scognamiglio, Lukas Bruder, Katrin Dulitz, and Frank Stienkemeier — University of Freiburg, Freiburg, Germany

Despite the low perturbative environment provided by the superfluidity of helium nanodroplets, excited or charged dopants can be strongly affected by the surrounding helium atoms. Numerous processes can be triggered by the electronic excitation and ionization of the dopant. For example, the repulsive electron-He interaction can result in the ejection of electronically excited dopants [1] which can be accompanied by electronic relaxation induced by the He environment [2]. In some cases, pairwise He-dopant interaction can also lead to the formation of He-dopant exciplexes [2,3]. Desorption dynamics, electronic relaxation as well as exciplex formation, strongly depend on the dopant species and still lack a complete understanding. We present an experimental study of the desorption dynamics of photo-excited Cs atoms attached to He nanodroplets using femtosecond pump-probe spectroscopy in combination with velocity-map imaging detection.

[1] M. Mudrich, F. Stienkemeier, Int. Rev. Phys. Chem. 33, 301-339, (2014).

[2] E. Loginov, M. Drabbels, J. Phys. Chem. A 111, 7504-7515, (2007).

[3] J. von Vangerow et al., J. Phys. Chem. Lett. 8 (1), 307-312, (2017).