dc.contributor.author | Noah Nzeki William | |
dc.contributor.author | Eric Ouma Jobunga | |
dc.contributor.author | Chandra Shekhar Singh | |
dc.date.accessioned | 2022-03-28T07:50:26Z | |
dc.date.available | 2022-03-28T07:50:26Z | |
dc.date.issued | 2021-01-26 | |
dc.identifier.citation | Noah Nzeki William et al 2021 J. Phys. Commun. 5 025006 | en_US |
dc.identifier.uri | https://ir.tum.ac.ke/handle/123456789/17447 | |
dc.description.abstract | Differential and integral cross-sections, as well as the alignment and lambda parameters for positron impact
excitation of the lowest autoionizing state of potassium atom, have been calculated using a non-relativistic
distorted wave method in the energy range of 18.9–1500 eV. The distortion potential in the initial and final
channel state comprises a linear combination of static potential plus polarizationand absorption potentials.
The approximate Roothan-Hartree–Fock (RHF)wavefunctionsMulti zeta wavefunctions given by
Clementi and Roetti have been used. The inclusion of polarization and absorption potentials has improved
integral cross-section and alignment parameter results. The integral cross sections have shown the near threshold resonance structure revealed in electron impact excitation experimental results. Differential cross-section and lambda parameter results have been calculated and presented for future comparison since there
are no other results available in the literature for positron impact excitation. | en_US |
dc.language.iso | en | en_US |
dc.publisher | Journal of Physics Communications | en_US |
dc.relation.ispartofseries | J. Phys. Commun.;5 (2021) 025006 | |
dc.subject | Positron | en_US |
dc.subject | Potassium | en_US |
dc.subject | lowest autoionizing state | en_US |
dc.subject | Distortion potential | en_US |
dc.subject | Distorted wave | en_US |
dc.subject | Cross-section | en_US |
dc.title | Positron impact excitation of lowest autoionizing state of potassium atom using distorted wave method with absorption and polarization potentials | en_US |
dc.type | Article | en_US |