Intramolecular dynamics due to electron transitions: from photoelectron spectroscopy to Femtochemistry

Select spectroscopic and chemical physics problems associated with atomic m otion triggered by electronic transitions are the topics of this paper. The story starts with the initial stimulation provided by Dick Brundle's photo electron spectroscopy studies of adsorbed molecules and continues to contem porary examples in photoelectron spectroscopy and Femtochemistry, all of wh ich are theoretically modelled within a unified framework of time-dependent , driven oscillators and decaying states. (C) 1999 Elsevier Science Ltd. Al l rights reserved.