Electron Impact Excitation of the Lowest Autoionizing State Incesium Using Distorted Wave Method
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Date
2015-11
Authors
Gichobi, Peterson Muriithi
Journal Title
Journal ISSN
Volume Title
Publisher
Kenyatta University
Abstract
In previous studies made on electron impact excitation of lowest autoionizing state of
cesium atom, there are discrepancies in the results obtained using theoretical and
experimental methods. Even the theoretical results do not agree among themselves. So in this study, differential cross sections, integral cross sections, alignment parameter and
angular correlation parameter (lambda) for electron impact excitation of the lowest
autoionizing state in cesium have been calculated using Distorted Wave Method with the
new distortion potential. We have applied a linear combination of static potentials of the
target taken in both initial and final states as the final channel distortion potential and
static potential in the initial state as the initial channel distortion potential. The wave
functions used in this model are the double zeta wave functions. Numerical calculations
have been performed using a modified DWBA,l program. Comparison of the present
results with the available theoretical and experimental results shows that the present
integral cross sections results at low energies (≤ 40 eV) are in better agreement with the
experimental results compared to other theoretical results. Lambda and alignment
parameters results have the same trend as other theoretical results even though the
differential cross section results are in disagreement with the other theoretical result.
Description
A Thesis Submitted in Partial Fulfillment of the Requirements for the Award of the Degree of Master of Science in Theoretical Physics in the School of Pure and Applied Sciences of Kenyatta University November, 2015