Desorption Dynamics of Rb_2 Molecules off the Surface of Helium Nanodroplets

Abstract

The desorption dynamics of rubidium dimers (Rb_2) off the surface of helium nanodroplets induced by laser excitation is studied employing both nanosecond and femtosecond ion imaging spectroscopy. Similarly to alkali metal atoms, we find that the Rb_2 desorption process resembles the dissociation of a diatomic molecule. However, both angular and energy distributions of detected Rb_2^+ ions appear to be most crucially determined by the Rb_2 intramolecular degrees of freedom rather than by those of the Rb_2He_N complex. The pump-probe dynamics of Rb_2^+ is found to be slower than that of Rb^+ pointing at a weaker effective guest-host repulsion for excited molecules than for single atoms.

arXiv commentaccepted by J. Phys. Chem. A (2016)

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Cited by in corpus (4)

• Coherent multidimensional spectroscopy of dilute gas-phase nanosystems
• Coherent multidimensional spectroscopy in the gas phase
• Quantum-State-Sensitive Detection of Alkali Dimers on Helium Nanodroplets by Laser-Induced Coulomb Explosion
• Nonadiabatic Laser-Induced Alignment Dynamics of Molecules on a Surface