Electron-Molecule Collisions in Different Environments

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Processes of interaction of low-energy electrons with molecules play important role ingaseous, plasma, liquid and condensed-matter environments. Increased interest tothese processes is stimulated by recent studies of their role in the physics of the upperatmosphere and in biological environments. Placing molecules in laser fields createsopportunities for control and manipulation of electron-molecule collision processes.Electron-molecule interactions in different environments present interest not only due totheir importance in applications, but also because they demonstrate interesting physicsmechanisms.The present project proposes to study electron-molecule collision processes in gasphase, on surfaces, in condensed matter environment and in the presence of stronglaser fields.The first part of the proposal deals with dissociative electron attachment to polyatomicmolecules with the account of interaction between two resonances or interactionbetween several vibrational modes. The role of vibrational Feshbach resonances due toweakly-bound dipole-supported states in these systems will be further investigated. Thesecond class of processes which will be studied is dissociative electron attachment tophysisorbed molecules and molecules embedded in bulk medium. The theory of theseprocesses taking into account the electron interaction with the environment will befurther developed. Finally, the effects of laser field in electron-molecule interaction willbe studied. The main focus will be on the above-threshold ionization and particularly itsresonant enhancement which was recently discovered in atom ionization.