Pulse field-ionization studies of ion-molecule reaction dynamics and photodissociation dynamics using the third generation synchrotron radiation

The dissertation contains three major parts.; Part I introduces Vacuum Ultra-violet (VUV) Photoionization, photoelectron spectroscopy and some of its derivative methods such as Pulse Field Ionization Photoelectron (PFI-PE), PFI-PE Photoion coincidence (PFI-PEPICO) and PFI-PE Secondary ion coincidence (PFI-PESICO). It also introduces the synchrotron VUV radiation facility at the Chemical Dynamics Beamline of the ALS associated with the Lawrence Berkeley National Lab. Synchrotron VUV radiation is the main light source for the work presented in this thesis. The high resolution spectroscopy endstation of ALS will also be described in part I.; Part II discusses the study of unimolecular dissociative photoionization process using PFI-PEPICO technique. The appearance energy of N+ from N2 is reported from studying the reaction N2+ hnu → N+ + N + e-. Very accurate bond dissociation energies of N2 AND N2+ are obtained by using the thermodynamic cycle of the system.; Part III focuses on ion-molecule reactions. Using synchrotron VUV radiation, state-selected reactions H2+ (X, upsilon+ , N+) + He → HeH+ + H, HD + (X, upsilon+, N+) + He → HeH + + D (HeD+ + H) are studied thoroughly using PFI-PEPICO, PFI-PESICO and VUV-PI-GIB methods. Additionally, corresponding quasi-classical trajectory calculations and time dependent three dimensional quantum scattering calculations are reported in this part to compare with the experimental results.