Open AccessExcitation of the lowest autoionizing level of caesium atoms by positron impact
Author(s) -
Abednego Wambua Munywoki,
J. Okumu,
Chandra Shekhar Singh
Publication year - 2021
Publication title -
african journal of pure and applied sciences
Language(s) - English
Resource type - Journals
ISSN - 2710-0758
DOI - 10.33886/ajpas.v2i1.189
Subject(s) - positron , atomic physics , excitation , electron ionization , projectile , electron , range (aeronautics) , physics , scattering , cross section (physics) , atom (system on chip) , electron scattering , nuclear physics , ionization , materials science , ion , optics , quantum mechanics , computer science , embedded system , composite material
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.