SEARCHING FOR THE LOW-ENERGY ENHANCEMENT IN 91 Zr Bonginkosi Richard Zikhali A thesis submitted in partial fulfilment of the requirements for the degree of Master of Science in the Department of Physics and Engineering at University of Zululand Supervisor: Dr. M. Wiedeking (iThemba LABS) Co-supervisors: Dr. B.V. Kheswa (iThemba LABS, University of Oslo) Dr. S.S. Ntshangase (University of Zululand) September 2016