This thesis describes an experimental study of elastic electron scattering from
CF2 radicals, in the intermediate energy regime. Measurements of the absolute
differential, integral and momentum transfer cross sections for CF2 are presented.
These measurements were performed using a new crossed beam spectrometer,
incorporating a supersonic gas source and normalised using a new technique,
with both of these features being extensively developed as a major part of this
study.
The organisation of this thesis is as follows: A brief justification for this research
is presented in Chapter 1, together with a review of the spectroscopy and
electron collision cross sections which are currently available for the CF2 radical.
The crossed beamed apparatus and experimental techniques used to perform the
present cross section measurements are then described in detail in Chapter 2, and
the theory behind the new normalisation technique is subsequently presented in
Chapter 3.
Results from the present study are given in Chapter 4. Firstly, differential cross
sections measurements for stable molecules are presented, to validate the new
normalisation method. Characterisation data for the dissociation dynamics of
C2F4 into CF2 radicals are then presented and, finally, differential cross section
measurements for the CF2 radical are explored. Where possible, the measured
data for CF2 are compared against results from theoretical calculations and the
implications of the present results are discussed. The major findings of this
research are then summarised in Chapter 5, and directions for future research
using the present apparatus are also discussed here. Finally, some additional
findings from this research and calibration data for the current apparatus are
given in the appendices.
| Identifer | oai:union.ndltd.org:ADTP/216400 |
| Date | January 2008 |
| Creators | Hargreaves, Leigh Randall, harg0032@flinders.edu.au |
| Publisher | Flinders University. School of Chemsitry, Physics and Earth Sciences |
| Source Sets | Australiasian Digital Theses Program |
| Language | English |
| Detected Language | English |
| Rights | http://www.flinders.edu.au/disclaimer/), Copyright Leigh Randall Hargreaves |
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