RP-Department of Physics
Browse by
Recent Submissions
-
Exposure from Thoron, Radon and Modelling Indoor Gamma Radiation Dose in Homa Bay County, Kenya
(Kenyatta University, 2023)Homa and Ruri hills in Homa Bay County, Kenya, are associated with high background radiation levels. Presently, they are experiencing high human settlement. Maize is the major food crop and Lake Victoria is the major water ... -
Effect of the use of inorganic- based photoluminescent materials in solar energy devices application
(WJAETS, 2023)The dynamic processes that take place in life require energy. The main convenient source of energy even in living tissue are hydrocarbons. This is due to the high-carbon based energy source that eventually converts fossil ... -
Implementation of a Wide Band and Low Noise Signal Generator Based on Phase Locked Loop
(Kenyatta University, 2023)A signal generator, an essential electronic test instrument with versatile applications, finds its utility in various fields such as cellular communications, radar systems, microstrip antennas, and electronics labs. ... -
Validation of Popular Models Used in the Analysis of Specific Activity of Primordial Radionuclides in Environmental Samples through 1-D Analytical Modeling
(Hirosaki University Press, 2019)A scientific model may be considered agreeable if it conforms to given scientific laws, in addition to being able to procure data that can be replicated to an acceptable level when other time-tested and proven methodologies ... -
Radon and Thoron; Radioactive Gases Lurking in Earthen Houses in Rural Kenya
(Frontiers in Public Health, 2019)In this paper, documented studies on radon and thoron concentrations in earthen dwellings and 238U and 232Th concentrations in soil in Kenya are reviewed. High concentrations of the isotopes were recorded in the earthen ... -
Optical Properties and Analysis of OJL Model’s Electronic inter-band Transition Parameters of TiO2 Films
(2018)Titanium dioxide is a wide band gap semiconductor responsible for the bright white appearance in most substances. This material has many unique properties due to its extra-ordinary chemical stability. TiO2 has a conduction ... -
Effect of Tio2 Compact Layer on DSSC Performance
(Path of Science., 2018)Dye-sensitized solar cells offer an economically reliable and suitable alternative in moderating the challenges presented by the existing convectional photovoltaic cells. Whereas, for convectional solar cells the semiconductor ... -
Assessment of Radioactivity Levels and Risks Due to Different Rock Types from the KERIO Valley “High Background Radiation Area (HBRA)” of Kenya
(IJMPSR, 2015)The goal of this study was to analyse the natural radioactivity levels and assess the contribution of different rock types to environmental dose in the Kerio Valley region of Kenya, a suspect high background radiation area ... -
Important Parameters for Optimized Metal Nanoparticles‑Aided Electromagnetic Field (EMF) Effect on Cancer
(Springer Nature, 2018)Background: A number of experimental research findings for the metal nanoparticles (NPs)-mediated EMF photothermal therapy of cancer cells show an intriguing trend of the NPs’ size-dependent efficacy. This is a phenomenon ... -
Calculation of Cross Sections for Elastic Scattering of Electrons at Intermediate Energies by a Magnesium Atom
(The African Review of Physics, 2014)We have obtained differential and integral cross sections for elastic scattering of electrons by magnesium atom at 10 – 100 eV using a complex, local, energy-dependent, spherically-symmetric optical potential incorporating ... -
Design and Implementation of a Secure Mobile Phone-Based Route Navigator (Mguide), Adapted for the Visually Challenged People
(Springer Link, 2023)This paper is focused on the development of a turn-by-turn voice navigation mobile application “mGuide” adapted for visually challenged people (VCP). The application was developed in response to the challenges of outdoor ... -
Distorted Wave Born and Optical Potential Calculation Methods for Electron-Sodium Elastic Scattering Cross-Section at Intermediate Energies
(Kenyatta University, 2015)The first order distorted wave Born approximation (DWBA) and the optical potential (OP) method are systematically compared in the calculation of differential cross sections and integral cross sections in the elastic ... -
Effect of Deposition Parameters on Optical and Electrical Properties of Sno2: Al Thin Films Prepared By Spray Pyrolysis Technique for Optoelectronic Devices
(Natural Sciences Publishing company, 2018)Transparent Aluminum doped tin oxide (SnO2:Al) thin films with different Al percentage (1.96%, 3.85%, 5.66%, 7.41% and 9.09%) were fabricated using a low cost spray pyrolysis technique at optimized deposition parameters. ... -
Positron impact elastic scattering by calcium atom using first order distorted wave born approximation with a complex potential
(Kenyatta University, 2022-06)Precise positron scattering cross section data are essential for the development of a wide range of technological fields such as astrophysics, plasma sciences, material sciences and bio-medicine. Thus, lack of complete ... -
Effects of zinc oxide nanostructures on performance of natural dye sensitized solar cells
(Kenyatta University, 2022-06)Dye Sensitized Solar Cell (DSSC) is a very promising development in photovoltaic technology. In DSSCs, dye molecules provide the charges, while a semiconductor collects and transports the charge. The performance of DSSCs ...
-
Exposure from Thoron, Radon and Modelling Indoor Gamma Radiation Dose in Homa Bay County, Kenya
(Kenyatta University, 2023)Homa and Ruri hills in Homa Bay County, Kenya, are associated with high background radiation levels. Presently, they are experiencing high human settlement. Maize is the major food crop and Lake Victoria is the major water ... -
Effect of the use of inorganic- based photoluminescent materials in solar energy devices application
(WJAETS, 2023)The dynamic processes that take place in life require energy. The main convenient source of energy even in living tissue are hydrocarbons. This is due to the high-carbon based energy source that eventually converts fossil ... -
Implementation of a Wide Band and Low Noise Signal Generator Based on Phase Locked Loop
(Kenyatta University, 2023)A signal generator, an essential electronic test instrument with versatile applications, finds its utility in various fields such as cellular communications, radar systems, microstrip antennas, and electronics labs. ... -
Validation of Popular Models Used in the Analysis of Specific Activity of Primordial Radionuclides in Environmental Samples through 1-D Analytical Modeling
(Hirosaki University Press, 2019)A scientific model may be considered agreeable if it conforms to given scientific laws, in addition to being able to procure data that can be replicated to an acceptable level when other time-tested and proven methodologies ... -
Radon and Thoron; Radioactive Gases Lurking in Earthen Houses in Rural Kenya
(Frontiers in Public Health, 2019)In this paper, documented studies on radon and thoron concentrations in earthen dwellings and 238U and 232Th concentrations in soil in Kenya are reviewed. High concentrations of the isotopes were recorded in the earthen ... -
Effect of Tio2 Compact Layer on DSSC Performance
(Path of Science., 2018)Dye-sensitized solar cells offer an economically reliable and suitable alternative in moderating the challenges presented by the existing convectional photovoltaic cells. Whereas, for convectional solar cells the semiconductor ... -
Assessment of Radioactivity Levels and Risks Due to Different Rock Types from the KERIO Valley “High Background Radiation Area (HBRA)” of Kenya
(IJMPSR, 2015)The goal of this study was to analyse the natural radioactivity levels and assess the contribution of different rock types to environmental dose in the Kerio Valley region of Kenya, a suspect high background radiation area ... -
Optical Properties and Analysis of OJL Model’s Electronic inter-band Transition Parameters of TiO2 Films
(2018)Titanium dioxide is a wide band gap semiconductor responsible for the bright white appearance in most substances. This material has many unique properties due to its extra-ordinary chemical stability. TiO2 has a conduction ... -
Important Parameters for Optimized Metal Nanoparticles‑Aided Electromagnetic Field (EMF) Effect on Cancer
(Springer Nature, 2018)Background: A number of experimental research findings for the metal nanoparticles (NPs)-mediated EMF photothermal therapy of cancer cells show an intriguing trend of the NPs’ size-dependent efficacy. This is a phenomenon ... -
Calculation of Cross Sections for Elastic Scattering of Electrons at Intermediate Energies by a Magnesium Atom
(The African Review of Physics, 2014)We have obtained differential and integral cross sections for elastic scattering of electrons by magnesium atom at 10 – 100 eV using a complex, local, energy-dependent, spherically-symmetric optical potential incorporating ... -
Design and Implementation of a Secure Mobile Phone-Based Route Navigator (Mguide), Adapted for the Visually Challenged People
(Springer Link, 2023)This paper is focused on the development of a turn-by-turn voice navigation mobile application “mGuide” adapted for visually challenged people (VCP). The application was developed in response to the challenges of outdoor ... -
Distorted Wave Born and Optical Potential Calculation Methods for Electron-Sodium Elastic Scattering Cross-Section at Intermediate Energies
(Kenyatta University, 2015)The first order distorted wave Born approximation (DWBA) and the optical potential (OP) method are systematically compared in the calculation of differential cross sections and integral cross sections in the elastic ... -
Effect of Deposition Parameters on Optical and Electrical Properties of Sno2: Al Thin Films Prepared By Spray Pyrolysis Technique for Optoelectronic Devices
(Natural Sciences Publishing company, 2018)Transparent Aluminum doped tin oxide (SnO2:Al) thin films with different Al percentage (1.96%, 3.85%, 5.66%, 7.41% and 9.09%) were fabricated using a low cost spray pyrolysis technique at optimized deposition parameters. ... -
Positron impact elastic scattering by calcium atom using first order distorted wave born approximation with a complex potential
(Kenyatta University, 2022-06)Precise positron scattering cross section data are essential for the development of a wide range of technological fields such as astrophysics, plasma sciences, material sciences and bio-medicine. Thus, lack of complete ... -
Effects of zinc oxide nanostructures on performance of natural dye sensitized solar cells
(Kenyatta University, 2022-06)Dye Sensitized Solar Cell (DSSC) is a very promising development in photovoltaic technology. In DSSCs, dye molecules provide the charges, while a semiconductor collects and transports the charge. The performance of DSSCs ... -
Opto-Electrical Properties of Chemical Bath Deposited Cu4SnS4 Thin Films
(International Journal of Thin Film Science and Technology, 2021): Thin films could be explained as a very thin layer of a substance deposited onto various substrates. Nowadays, a variety of binary, ternary, quaternary and pent nary films have been produced by using different deposition ... -
Optical Characterization of Photocatalytic Copper Doped Thin Films of Anodized Titanium
(IOP Publishing, 2020)Titanium oxide is used in a myriad of applications such as in capacitors, insulation paints among others. It is a prime candidate for water splitting due to its photocatalytic properties. In this work, undoped TiO2 thin ... -
Cancer and Non-Cancer Health Risks from Carcinogenic Heavy Metal Exposures in Underground Water from Kilimambogo, Kenya
(Elsevier, 2020)Water is very crucial for man, animals and plants because of its health implications in case it is polluted. Water has many uses like drinking for man and animals, domestic use and for agricultural use. The concentration ... -
Environmental Assessment of Heavy Metal Pollutants in Soils and Water from Ortum, Kenya
(Springer, 2020)Analysis of elemental concentration in soil and water was carried out in Ortum to ensure safe utilization of soil and water resources for agriculture, industrial, and household purposes. Elemental analysis of soil and water ... -
Excitation of the Lowest Autoionizing Level of Caesium Atoms by Positron Impact
(African Journal of Pure & Applied science (AJPAS), 2021)We have obtained differential and integral cross sections for the excitation of caesium atom to the lowest autoionizing level by positron impact using the distorted wave approximation. We have also done calculations for ...
RSS 1.0