Studies of the Dynamics of Ion Molecule Collisions Using Cross Beam Technique.
Abstract
Available from UMI in association with The British Library. Requires signed TDF. The work presented in this thesis involved assembling and testing an apparatus designed to observe photon-scattered ion coincidences in crossed beam arrangement. The crossed beams technique has been used to study the scattering of a fast atomic ion of helium (He^+) by argon gas atoms. The results are reported for collision energies between 100-900eV. The data of reduced cross sections show a pure elastic process at energies 100eV and 200eV. At higher energies there is a region of pure elastic process at small angles but at large angles there is a small inelastic component. The reduced cross section at 600eV is in good agreement with the data extracted from Barat et al (1970) (62) especially in the region of pure elastic scattering (small angles). The deflection function and repulsive potential show reasonable agreement with the deflection function and repulsive potential obtained by processing the data of Barat et al (1970) in the same way that our data were processed. The coincidence measurement was one of the main objectives of designing this apparatus. Crossed beams of He^{+} on N _2 were set up and the time correlation between the scattered ions of He^{+} at angle 2.1^circ and photons of wavelength 337.1nm emitted from transition of C ^3pi_{rm u} to B^3pi_{rm u} was recorded. The feasibility calculation and the result obtained at a single scattering angle proves that the required result is not far from reach.
- Publication:
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Ph.D. Thesis
- Pub Date:
- 1989
- Bibcode:
- 1989PhDT........85A
- Keywords:
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- Physics: Molecular