Photoselective vibrational excitation

The processes of energy acquisition, storage and disposal in clusters are of considerable interest in their own right and also for the interpretation of similar processes in finite systems. Consider vibrational energy excitation of an intramolecular vibration of a molecule in a cluster, or of a cluster inter-molecular mode(s), which can be accomplished by collisional excitation, photoselective vibrational excitation, electronic excitation followed by intramolecular radiationless transitions or exciton trapping.178 In charged clusters... 

The goal of this book is to present in a coherent way the problems of the laser control of matter at the atomic-molecular level, namely, control of the velocity distribution of atoms and molecules (saturation Doppler-free spectroscopy) control of the absolute velocity of atoms (laser cooling) control of the orientation, position, and direction of motion of atoms (laser trapping of atoms, and atom optics) control of the coherent behavior of ultracold (quantum) gases laser-induced photoassociation of cold atoms, photoselective ionization of atoms photoselective multiphoton dissociation of simple and polyatomic molecules (vibrationally or electronically excited) multiphoton photoionization and mass spectrometry of molecules and femtosecond coherent control of the photoionization of atoms and photodissociation of molecules. 

The photoselective laser-induced excitation and dissociation of molecules have been described in detail in a munber of monographs and reviews (Jortner et al. 1981 Letokhov 1983 Bagratashvili et al. 1985f> Letokhov 1989 Quack 1998). Therefore, we shall present below only brief information about the progress made in this field. The main schemes for isotope-selective dissociation of molecules via vibrational states are shown in Fig. 11.1. Accordingly, the problem of photoselective laser control of molecules will be considered below in consecutive order, starting with the simplest scheme of Fig. 11.1(a) and ending with that of Fig. 11.1(c). 

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