Browsing by Supervisor "Rakitianski, Sergei A."

Browsing by Supervisor "Rakitianski, Sergei A."

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  • Analytic properties of the Jost functions 
    Mvondo-She, Yannick (University of Pretoria, 2013)
    Recently, was developed a new theory of the Jost function, within which, it was split in two terms involving on one side, singlevalued analytic functions of the energy, and on the other, factors responsible for the ...
  • Extracting resonance parameters from experimental data on scattering of charged particles 
    Vaandrager, Paul (University of Pretoria, 2015)
    A method of extracting resonance parameters from scattering data is outlined for scattering that involves Coulomb interactions. This is done for single-channel scattering, as well as multi-channel scattering. Within the ...
  • Jost-matrix analysis of nuclear scattering data 
    Vaandrager, Paul (University of Pretoria, 2020)
    The analysis of scattering data is usually done by fitting the S-matrix at real experimental energies. An analytic continuation to complex and negative energies must then be performed to locate possible resonances and bound ...
  • Locating Resonances in a Complex Potential Field 
    Fakira-Du Toit, Hamida Hamida Sarah Jane (University of Pretoria, 2016)
    The main question that has been answered in this research project is: what happens to the singularities of the S-matrix when the interaction potential becomes complex? In other words, we looked at the resonance spectral ...
  • Power series expansion of the Jost function on the complex angular momentum plane 
    Tshipi, John Tshegofatso (University of Pretoria, 2016)
    The aim of this research is to develop a method for expanding the Jost functions as a Taylor-type power series on the complex angular momentum plane. From this method in conjunction with the Watson transformation, we ...
  • Spectral points of the hypernuclear systems AAn and Ann 
    Gopane, Ishmael Mmusi (University of Pretoria, 2015)
    Three-body hypernuclear nn and n systems are studied within the hyperspherical approach framework with local two-body S-wave potentials describing the nn, n and interactions using the Jost functions method. The ...