2006/04/18 by P. Claas, P Claas, G Droppelmann +7
Chemistry · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Atomic and Subatomic Physics Research #Quantum, superfluid, helium dynamics #physics.atm-clus
paper · pdf · doi:10.1088/0953-4075/39/19/s23
arxiv created 2006/04/18 · openalex publication_date 2006/09/25 · arxiv updated 2009/12/01 · openalex created_date 2021/02/01 · openalex updated_date 2026/07/30
The dynamics of vibrational wave packets excited in K 2 dimers attached to superfluid helium nanodroplets is investigated by means of femtosecond pump–probe spectroscopy. The employed resonant three-photon-ionization scheme is studied in a wide wavelength range and different pathways leading to K 2 + formation are identified. While the wave packet dynamics of the electronic ground state is not influenced by the helium environment, perturbations of the electronically excited states are observed. The latter reveal a strong time dependence on the timescale 3–8 ps which directly reflects the dynamics of desorption of K 2 off the helium droplets.