Browsing PHD-Department of Physics by Title
Now showing items 1-12 of 12
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Comparison of the optical potential method and the distorted wave born approximation method in electron – atom elastic scattering.
(Kenyatta University, 2015-11)The optical potential (OP) method has been widely used in electron-atom elastic scattering since for a given distorting potential, a solution valid to all orders of perturbation series can be obtained. The first-order ... -
Crystallization Kinetics, Structural and Optical Properties of In-Se-Bi Bulk and Thin Films for Reversible Phase Change Memory Applications
(Kenyatta University, 2021)A detailed study of crystallization kinetics and structural properties of In-Se-Bi alloys has been carried out in this research. Kissinger’s analysis method was employed to investigate crystallization kinetics of the ... -
Effect of Spatial Dielectric Function on the Total Energy of Cubic Quantum Dots and Frequency Dependent Dielectric Functions in Binary Semi-Conductors
(Kenyatta University, 2020)Spatial and frequency dependent response functions of medium-direct band gap binary semiconductors were studied at both nanoscale and in bulk form using ab initio method. To understand why the total energy and the band ... -
Effects of Human Exposure and Associated Risks Due to Natural Radioactivity and Heavy Metals in Bureti, Kericho County, Kenya
(Kenyatta University, 2022)The knowledge of distribution of natural radiation sources as well as radiation levels in the environment is important for evaluating the risk associated with natural radiation exposure. The activity concentration of ... -
First Principles Study of Structural, Electronic and Mechanical Properties of Lanthanum Fluoride and Lanthanum Doped Barium Fluoride
(Kenyatta University, 2020)Lanthanum Fluoride (LaF3) has several applications for instance, in electrodes manufacture, fluorescent lamps and fiber optic devices due to its high heat capacity. Barium fluoride (BaF2) is an alkaline-earth element ... -
Human Exposure and Associated Risks Due to Natural Radioactivity and Heavy Metals In Ortum, West Pokot County, Kenya
(Kenyatta University, 2021)The background radiation in air, the activity concentration of selected radionuclides in soil and rock samples, the radon and thoron concentration in selected mud houses and elemental concentration of heavy metals in soil ... -
Influence of silver nanoparticles on the optical properties of methylene blue and curcumine dyes
(Kenyatta University, 2014)It is emerging that dyes and nanoparticles (NP) of Ag, Au and Cu have optical properties with the potential for transforming and enhancing applications of light energy in opto-electronics, solar cells and even radiotherapy ... -
Modelling Radon and Thoron Exhalation and Measurement of Total Natural Radiation Exposure in Mrima Hill, Kenya
(Kenyatta University, 2015-01-22)Mrima hill in Kwale County is one of the regions in Kenya with the highest levels of background radiation. Rich deposits of mineral ores such as niobium and manganese are also known to exist. Small-scale farming is the ... -
Numerical Simulation of Fluid Flow in a Dual Porosity Geothermal System with a Thin Zone of High Horizontal Permeability
(Kenyatta University, 2007)A numerical simulator capable of mode ling fluid flow in layered dual porosity geothermal systems with high horizontal permeability has been developed. The simulator can match multiple-peaked tracer profiles from injection ... -
Pozzolanicity of selected kaolinites with special focus on pyroprocessing parameters
(2011-12-20)In this study, the pozzolanic reactivity of selected clay minerals (kaolin) with lime was investigated mainly to establish their suitability in low cost housing. Clay minerals from eleven different regions in Kenya were ... -
Relativistic Distorted Wave Approach to Electron Impact Excitation of Heavy Rare Gases Using a Complex Potential
(Kenyatta University, 2022)Data on excitation of rare gases is important in the study of plasma displays, lighting and lasers. From literature, both relativistic and non-relativistic computations performed on electron impact excitation of low-lying ... -
''A study of a system equation of thin elastic quadric shells''
(2012-05-07)A problem connected with the study of doubly curved thin elastic shallow shells in the theory of nonlinear elasticity is considered. The equations of equilibrium are derived in the form, 1(x,y) +Eh42(x,y) = ...
