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Theoretical study of the time-resolved photoelectron spectrum of Na 2 F: effects of thermal initial conditions
- Source :
- The European Physical Journal D - Atomic, Molecular and Optical Physics. 24:181-184
- Publication Year :
- 2003
- Publisher :
- Springer Science and Business Media LLC, 2003.
-
Abstract
- The excited state dynamics of the Na2F cluster initiated by a femtosecond laser pulse is studied considering a thermally excited initial sample. Within a pump-probe set-up, the time-dependent photoelectron spectrum is calculated, which is shown to be a sensitive tool to study intramolecular motion of the cluster. Temperature effects are taken into account through thermal averaging over the time-dependent spectra obtained from different initial vibrational states of the cluster. The nuclear motion upon laser excitation is described by full-dimensional quantum wavepacket propagation using explicit, realistic pump and probe pulses. The characteristic features of the time-resolved photoelectron spectra of the Na2F cluster, identified as due to periodic bending motion of the cluster as well as to the excitation of the stretching mode, are found to be robust against increasing vibrational temperature of the cluster beam. This finding is important for possible future experiments.
Details
- ISSN :
- 14346079 and 14346060
- Volume :
- 24
- Database :
- OpenAIRE
- Journal :
- The European Physical Journal D - Atomic, Molecular and Optical Physics
- Accession number :
- edsair.doi...........afc58c0c5a023b744c9bd8324e78f450