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PHOTODISSOCIATION AND O(1D) REACTIONS OF NITROUS OXIDE

Author
Tokel, Onur
Abstract
The focus of this dissertation is on the application of the velocity map imaging
(VMI) technique to photodissociation and reaction dynamics. The multiplexing
advantage of the VMI technique enables us to gather both angular and translational
energy distributions simultaneously, with product quantum mechanical state
selectivity.
The first part of the thesis focuses on the ion-imaging experiments investigating
the 130 nm dissociation of N2O and spectroscopic studies of its reactions with
O(1D). The results are explained in conjunction with Hopper’s ab initio MCSCF
calculations in the linear and bent configurations. Our analysis provide the spinorbit
ratios, relative branching ratios and anisotropy parameters. We study
the NO product channel of the O(1D)+N2O reaction with REMPI techniques and
provide the first analysis of the rotational distribution of this channel. We will
conclude the discussion of the full and half reactions of the N2O molecule by
explaining the observed bimodal vibrational distribution in the NO channel.
The second part focuses on the design and development of a dual-beam apparatus
for the application of the VMI technique to reaction dynamics in a stateselective
manner. We provide the ion-optics design considerations and ion trajectory
simulations for satisfying the VMI conditions. Furthermore, a delayed extraction
scheme will be described which will be important in future state-selective
dual-beam VMI studies, allowing the critical low background environments for
these type of experiments.
Date Issued
2011-08Subject
photodissociation; biomolecular reactions; velocity mapped imaging; Nitrous Oxide; REMPI; VUV; O(1D)
Degree Level
Doctor of Philosophy
Has other format(s)
bibid: 8033943 bibid: 4829215
Type
dissertation or thesis