Electromagnetic processes in few-body systems
Loading...
Authors
Rampho, Gaotsiwe Joel
Issue Date
2010-11
Type
Thesis
Language
en
Keywords
Antisymmetrized molecular dynamics , Angular momentum projection , Glauber approximation , Current operators , Few-body systems , Electron-Nucleus scattering , Electromagnetic transitions , Differential cross section
Alternative Title
Abstract
Electromagnetic processes induced by electron scattering off few-nucleon systems are theoretically
investigated in the non-relativistic formalism. Non-relativistic one-body nuclear current
operators are used with a parametrization of nucleon electromagnetic form factors based on
recent experimental nucleon scattering data. Electromagnetic form factors of three-nucleon
and four-nucleon systems are calculated from elastic electron-nucleus scattering information.
Nuclear response functions used in the determination of differential cross sections for inclusive
and exclusive quasi-elastic electron-nucleon scattering from the 4He nucleus are also calculated.
Final-state interactions in the quasi-elastic nucleon knockout process are explicitly taken into
account using the Glauber approximation. The sensitivity of the response functions to the
final-state interactions is investigated.
The Antisymmetrized Molecular Dynamics approach with angular momentum and parity projection
is employed to construct ground state wave functions for the nuclei. A reduced form of
the realistic Argonne V18 nucleon-nucleon potential is used to describe nuclear Hamiltonian.
A convenient numerical technique of approximating expectation values of nuclear Hamiltonian
operators is employed. The constructed wave functions are used to calculate ground-state energies,
root-mean-square radii and magnetic dipole moments of selected light nuclei. The theoretical
predictions of the nuclear properties for the selected nuclei give a satisfactory description
of experimental values. The Glauber approximation is combined with the Antisymmetrized
Molecular Dynamics to generate wave functions for scattering states in quasi-elastic scattering
processes. The wave functions are then used to study proton knockout reactions in the 4He
nucleus. The theoretical predictions of the model reproduce experimental observation quite well.
Description
Citation
Rampho, Gaotsiwe Joel (2010) Electromagnetic processes in few-body systems, University of South Africa, Pretoria, <http://hdl.handle.net/10500/4885>