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Two colour pump-probe study and internal energy dependence of Rydberg state excitation

Journal article
Authors Mark Boyle
Martin Hedén
C.P. Schulz
Eleanor E B Campbell
Ingolf Hertel
Published in Physical Review A
Volume 70
Pages 051201
ISSN 1050-2947
Publication year 2004
Published at Department of Physics (GU)
Pages 051201
Language en
Links dx.doi.org/10.1103/PhysRevA.70.0512...
Keywords fullerene spectroscopy
Subject categories Atom and Molecular Physics and Optics

Abstract

Excitation of Rydberg states in isolated C60 is studied by time-resolved photoelectron spectroscopy in a femtosecond two-color pump-probe experiment. The relaxation time for electron-electron interaction is determined to be approximately 100 fs with the t1g(LUMO + 1) orbital being considered to define the doorway state in a nonadiabatic multielectron excitation process. The internal energy stored in vibrational modes of the C60 at 770 K is found to support the excitation process very efficiently while in "cold" C60 (80 K), no significant Rydberg population is detected.

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