Hannover 2016 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 11: Atomic clusters I (with MO)
A 11.4: Vortrag
Montag, 29. Februar 2016, 17:45–18:00, f107
Interatomic coulombic decay (ICD) in He nanodroplets — •Mykola Shcherbinin1, Aaron Laforge1, Sai Smruti Samantaray2, Vandana Sharma3, Robert Richter4, and Marcel Mudrich1 — 1University of Freiburg - Faculty of Mathematics und Physics, Freiburg, Germany — 2Indian Institute of Technology - Dept. of Physics, Chennai, India — 3Indian Institute of Technology, Department of Physics, Ordnance Factory Estate, India — 4Elettra - Sincrotrone Trieste, Basovizza, Trieste, Italy
ICD is an important relaxation process for electronically excited atoms which are weakly bound in molecules and clusters [1]. While ICD has been observed in van der Waals clusters containing Ne, Ar, and Xe before, for He, ICD has so far been studied only for the He dimer [2]. We present a synchrotron study of ICD induced in He nanodroplets by simultaneously ionizing and exciting one He atom of the droplet in a shakeup process. Subsequent transfer of internal energy to the neighbouring atoms leads to the formation of He+ atomic ions as well as small Hen+ cluster ions, which we observe in electron-ion-ion coincidence. The corresponding photoelectron as well as ion kinetic energy spectra reveal the details of the ICD and subsequent fragmentation processes.
[1] L. S. Cederbaum et al., Phys. Rev. Lett. 79, 4778 (1997) [2] T. Havermeier et al., Phys. Rev. Lett. 104, 133401 (2010)