Mainz 2017 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MO: Fachverband Molekülphysik
MO 20: Clusters III (with A)
MO 20.4: Vortrag
Freitag, 10. März 2017, 15:30–15:45, N 3
Time-resolved photoelectron spectroscopy on resonantly excited He nanodroplets — •A. C. LaForge1, Y. Ovcharenko2, B. Langbehn2, O. Plekan3, R. Cucini3, P. Finetti3, D. Iablonskyi4, A. Clark5, V. Oliver Álvarez de Lara5, P. Piseri6, T. Nishiyama7, M. Di Fraia3, C. Callegari3, K. C. Prince3, K. Ueda4, F. Stienkemeier1, M. Mudrich1, and T. Möller1 — 1Universität Freiburg — 2TU Berlin — 3Elettra-Sincrotrone Trieste — 4Tohoku University, Sendai — 5EPFL, Lausanne — 6Università di Milano — 7Kyoto University
The ionization dynamics of helium droplets resonantly excited by intense, XUV radiation has been investigated. Depending on the intensity, the excited atoms can decay by interatomic Coulombic decay (ICD) or form a network of excited atoms which then collectively autoionize leading to nanoplasma formation [1,2]. Recently, we have extended our studies to time resolve the processes using a pump-probe technique. Using a UV laser to deplete the excited states, we observe a signal loss in the ICD signal in the photoelectron spectrum for short time delays followed by its reappearance at longer time delays (> 1 ps).
[1] Y. Ovcharenko et al., Phys. Rev. Lett. 112, 073401 (2014)
[2] A. LaForge et al., Sci. Rep. 4, 3621 (2014)