Studies of Resonantly Enhanced Multiphoton Ionization Processes in Molecules

摘要

Studies were completed of several Resonance Enhanced Multiphoton Ionization(REMPI) processes in molecules. The overall objective of this effort was to provide a robust theoretical analysis and prediction of the key spectral features associated with various experimental and technology applications of this technique including its use for state-specific detection and production of species and for diagnostics in combustion and processing plasmas. Specific achievements of this research included: (1) studies of ion vibrational distributions produced by REMPI with emphasis on anomalous behavior in these distributions in molecules and molecular fragments, e.g. OH and CF; (2) ion rotational distributions that results from REMPI, the underlying dynamics of these processes, and the identification of schemes for enhancing state selectivity in these distributions; (3) use of photoelectron angular distributions produced by REMPI to probe molecular alignment, an important dynamical feature in gas-surface collisions and molecular fragmentation.