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Materie-Optik mit Edelgasmolekülen an Nanostrukturen / Matter Optics with Noble Gas Molecules and NanostructuresStoll, Werner Martin 18 December 2003 (has links)
No description available.
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Artificial neural network methods in few-body systemsRampho, Gaotsiwe Joel 30 November 2002 (has links)
Physics / M. Sc. (Physics)
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Structure of hypernuclei studied with the integrodifferential equations approachNkuna, John Solly 06 1900 (has links)
A two-dimensional integrodi erential equation resulting from the use of potential harmonics
expansion in the many-body Schr odinger equation is used to study ground-state
properties of selected few-body nuclear systems. The equation takes into account twobody
correlations in the system and is applicable to few- and many-body systems. The
formulation of the equation involves the use of the Jacobi coordinates to de ne relevant
global coordinates as well as the elimination of center-of-mass dependence. The form of
the equation does not depend on the size of the system. Therefore, only the interaction
potential is required as input. Di erent nucleon-nucleon potentials and hyperon-nucleon
potentials are employed to construct the Hamiltonian of the systems. The results obtained
are in good agreement with those obtained using other methods. / Physics
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Artificial neural network methods in few-body systemsRampho, Gaotsiwe Joel 30 November 2002 (has links)
Physics / M. Sc. (Physics)
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Structure of hypernuclei studied with the integrodifferential equations approachNkuna, John Solly 06 1900 (has links)
A two-dimensional integrodi erential equation resulting from the use of potential harmonics
expansion in the many-body Schr odinger equation is used to study ground-state
properties of selected few-body nuclear systems. The equation takes into account twobody
correlations in the system and is applicable to few- and many-body systems. The
formulation of the equation involves the use of the Jacobi coordinates to de ne relevant
global coordinates as well as the elimination of center-of-mass dependence. The form of
the equation does not depend on the size of the system. Therefore, only the interaction
potential is required as input. Di erent nucleon-nucleon potentials and hyperon-nucleon
potentials are employed to construct the Hamiltonian of the systems. The results obtained
are in good agreement with those obtained using other methods. / Physics / M.Sc. (Physics)
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Electromagnetic processes in few-body systemsRampho, Gaotsiwe Joel 11 1900 (has links)
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. / Physics / Ph D. (Physics)
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Electromagnetic processes in few-body systemsRampho, Gaotsiwe Joel 11 1900 (has links)
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. / Physics / Ph D. (Physics)
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