Abstract

Two-step laser photoelectron spectroscopy with temporally separated picosecond excitation and ionization light pulses is used to measure the rate of intramolecular vibrational relaxation (IVR) in jet-cooled trans- p- n-butylaniline. Qualitatively similar data are obtained using nanosecond laser sources despite differences in their coherence properties. IVR in propylaniline is found to be slower than in butylaniline in agreement with previous workers, and its rate depends on the conformation of the alkyl side chain.

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