Electron capture from hydrogenic systems by positrons and positive muons.

dc.contributor.authorUmar Dujain Ubaid Al-Kaabi
dc.date1997
dc.date.accessioned2022-05-18T05:45:49Z
dc.date.available2022-05-18T05:45:49Z
dc.degree.departmentCollege of Sciences
dc.degree.grantorKing Fahad for Petrolem University
dc.description.abstractIn the present study the cross sections of the following reactions have been calculated in the framework of the impulse approximation: e⁺ + H(1s) ---> (e⁺ e⁻)(1s) + H⁺ e⁺ + He⁺¹ (1s) ---> (e⁺e⁻)(1s) + He⁺², μ⁺ + X(1s) ---> (μ⁺e⁻)(1s) + X⁺¹ where X stands for H, He⁺¹, Li⁺², C⁺⁵, N⁺⁶, O⁺⁷ and Fe⁺²⁵. Though the impulse approximation was introduced as an improvement on the Born approximation, it was found to be systematically worse for scattering of electrons off atoms. However, for electron capture total cross sections from hydrogenic systems by positrons, in the energy range for which the impulse approximation is valid, the impulse approximation seems to be better. In this thesis the calculation shows features in the differential cross sections which indicate that even if the impulse approximation proves worse than the Born approximation for the total cross sections in these cases, the differential cross section may be better described by it.
dc.identifier.other5718
dc.identifier.urihttps://drepo.sdl.edu.sa/handle/20.500.14154/2018
dc.language.isoen
dc.publisherSaudi Digital Library
dc.thesis.levelMaster
dc.thesis.sourceKing Fahad for Petrolem University
dc.titleElectron capture from hydrogenic systems by positrons and positive muons.
dc.typeThesis

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