Research Papers/Topics in Physics

Characterization Of Snxsey / Sno2-Ni Prepared By Spray Pyrolysis For Photovoltaic Application

ABSTRACT Nickel doped tin oxide and tin monoselenide thin films were coated using spray pyrolysis. Nickel doped tin oxide Precursor solution was prepared using a 0.05M Tin (II) Chloride (SnCl4.2H2O) and 0.05M Nickel chloride 6-hydrate (NiCl2.6H2O) in de-ionized water and then being added in ethanol in the ratio 1:1 to get equal proportions, followed by about 2-3 drops of hydrochloric acid. Doping tin oxide was done using uniform concentration of (NiCl2.6H2O) of 0-10 %. Precursor solution of t...

Mapping Geothermal Heat Source In Homa Hills Using Gravity Technique

ABSTRACT Homa Hills geothermal prospect is located on the Nyanzian rift west of the Kenyan rift system. The manifestation of hot springs and steaming grounds in the area has revealed its geothermal potential. In order to fully asses the potential of this field, the heat source which is one of the main features of a geothermal system had to be properly located based on its perturbation on the gravity field. This enables gravity technique which is a high precision method for measuring density c...

Gamma Ray Spectrometric Analysis Of Sand Samples From Selected Beaches On Coastline Of Kenya

ABSTRACT Background radiation from natural sources is the major source of external dose in our environment. The major radionuclides responsible for this are 40K, 232Th, 238U and their products of decay. Beach sands are weathering resistant residuals of geological formations which gets to the beach by erosion from mainland or deposition through waves and current action from the ocean. Waves wash back lighter grains leaving behind heavy ones which may be rich in minerals such as zircon, ilmenit...

Numerical Modelling Of West Africa Regional Scale Aerosol Dispersion

Abstract The danger of aerosols loading in the lower atmosphere of West Africa is a source of concern both at the short or long term. Currently, there are about 45% available data sets over West Africa; hence, it is difficult to ascertain the level of threat that life forms in this region would be exposed to in the nearest future. In this thesis, it was proposed that the current challenges bedevilling the functionality of measuring devices are more of systemic error than design error. The ai...

The Effect Of Change Temperature On Volumetric Coefficient Of Liquids

Abstract Two types of liquids (water and ethanol) are used to investigate the volumetric change of these liquids with change of temperature in order to find the temperature coefficient for both liquids to relate the volumetric change with global warming. It reveals great agreement with theoretical consideration. So the volume of these liquids increased with increases of temperatures. 

Monte Carlo Modeling Of Effective Shielding Systems For Fast Neutrons

ABSTRACT In this thesis, we have designed a shielding system consisting of dual layers to shield fast neutrons. Monte Carlo simulation code (MCNP5) was used to simulate the spectra of 252Cf-neutron source and to verify the performance of several moderating materials and absorbers as well. The performance of high density polyethylene (HDPE) as moderating material was examined against different thermal neutron absorbers such as; borated polyethylene (BPE), Boric acid (H3BO3) and Boron carbide ...

Green Synthesis Of Silver Nanoparticles Using Azadirachta Indica (Neem) Leaves Extract

Abstract Noble metals nanoparticles are considered as promising material due to their unconventional characteristics owing to several technological applications. Their small size and large surface to volume ratio as compared to their bulk form leads to differences in their physical and chemical properties. As the results, these metallic nanoparticles have found a wide range of applications in almost all fields of research. Silver (Ag) nanoparticles are the most common one being employed in e...

Studies Of Propagation Impairments For Fixed Satellite Communication Links At The Microwave Frequencies In Nigeriaa

ABSTRACT  The study investigates the effect of propagation impairments such as rain, cloud, gases and tropospheric scintillation on fixed satellite communication link on earth-space path for frequencies between 10 and 50 GHz at Ku, Ka and V bands for 37 locations in Nigeria. Two standard elevation angles of 50, 550 as well as some elevation angles for links to recently launched Nigeria Communication Satellite, (NigComsat-1) were used in the computation of the propagation impairments for the...

Monte Carlo Modeling Of Fast Neutron Moderating System Suitable For Use In Boron Neutron Capture Therapy

Abstract There is no one treatment for cancer and the search for ways to combat cancer have led to many different treatments, including surgery, chemotherapy, and radiation therapy. However, these treatments are not always effective, and in such cases new treatments must be developed. Boron neutron capture therapy (BNCT) is a treatment that has been proposed to combat brain tumor and Neck tumors, two tumors that are resistant to traditional cancer therapies. Boron neutron capture therapy (BN...

Evaluation Of Radiation Protection In The X-Ray Departments In The Blue Nile State Hospitals

Abstract The aim of this study was to evaluate the radiation protection in the x –ray departments of the Blue Nile State. Four x –ray departments were selected in four hospitals. The study was conducted during the period from March to July 2017. The radiation doses were measurement in the x -ray rooms, dark rooms, doors and offices adjacent to the x-ray rooms using a survey meter. The final results showed that the doses received by the workers and public in these hospitals were within th...

Using Industrial Radiography In Pipeline

Abstract This research desiccation with the issue of radiography in petroleum pipelines. This is to make sure that welding is quality and that there are no defects inside the metal. That ensures the passage of raw safety. Also used radiation test to detect any defect inside the metal. also used some method to inspect like penetrant testing or magnetic participle testing. 

Evaluation Of Patients Effective Dose During Orthopedic Surgery

Abstract This study aimed to evaluation of patients radiation dose in orthopedic surgery in Khartoum state . A total of 91 patient from orthopedic surgery conducted using mobile c-arm fluoroscopic from three hospitals ,of period from July to November of 2018. To obtained formation of patients during orthopedic surgery used mobile C-arm fluoroscopy ,to recorded the demographic data (gender, age ,weight, hight) . The results presented as mean ± SD were the mean of ESAK was (mean ±0.31 SD) an...

Some Aspects Of The Higgs Boson In The Standard Model

Abstract In this thesis was studied some aspect of the Higgs boson in the Standard Model of Particle Physics. Also was calculated the Higgs boson as function of its mass as well as the branching ratios from to . Furthermore was calculated the Higgs decay rates into and gauge bosons and fermions in the Standard Model of Particle Physics. We find that in order for the Higgs to decay to any particle in this model, the mass of the Higgs should be . Also we found that, the total Higgs decay rate ...

A Study Of A Group Of Materials Variety, And Methods Used In Fabricating High Critical Temperature Superconductors

Abstract This research is conducted so as to provide information about almost of the researches done so far regarding superconductors and to provide a reference study that can help researchers in the same field of applications. Through the study of some scientific papers in this area, and aiming to summarize findings, and to facilitate the search for the interested researchers according to their needs, moreover, to highlight weather more research is needed to be conducted in this field or wh...

Renewable Energy Advantages And Disadvantages

Energy plays a major role in economic activity and is considered an important indicator of the growth and development and the progress of nations and prosperity, where we find that the countries most energy-consuming is the advanced and developing countries, and where the industry is booming in the biggest developing nations, in general, energy resources, renewable resources such as solar, wind, water and other untapped after broadly, and other non- renewable, such as coal, natural gas, oil a...


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