Excitation of the Lowest Autoionizing Level of Caesium Atoms by Positron Impact
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Date
2021
Authors
Munywoki, A. W.
Okumu, J.
Singh, C. S
Journal Title
Journal ISSN
Volume Title
Publisher
African Journal of Pure & Applied science (AJPAS)
Abstract
We have obtained differential and integral cross sections for the excitation of caesium atom to the lowest autoionizing level by positron impact using the distorted wave approximation. We have also done calculations for electron impact excitation of the same level using the same method and compared our present positron/electron impact results with the available theoretical positron/ electron impact results and experimental electron impact results. It is found that the present positron impact integral cross sections are higher than the cross sections of Pangantiwar and Srivastava at low and intermediate energies, but the results converge as the energy increases in the high energy range. The disagreement at near threshold energies is due to the different distortion potentials used in the two calculations. The charge on the projectile is also a determining factor in the shape of the scattering cross section curves.
Description
A research article published in African Journal of Pure and Applied science (AJPAS)
Keywords
Differential cross section, integral cross section, positron impact excitation, autoionizing state, distorted wave method, atomic collision
Citation
Munywoki, A. W., Okumu, J., & Singh, C. S. (2021). Excitation of the lowest autoionizing level of caesium atoms by positron impact. African Journal of Pure and Applied Sciences, 2(1), 77-83. https://doi.org/10.33886/ajpas.v2i1.189