Research Papers/Topics in Nuclear Sciences

Intercomparison of Performance Characteristics of Oslds and Tlds Used for Individual Monitoring

ABSTRACT This research work performed an intercomparison on some important performance characteristics of optically stimulated luminescence (OSL) and thermoluminescence (TL) dosimetry systems used by dosimetry services in Gabon and Ghana, respectively. The study verified the status of the selected performance indicators and propose ways to improve the performances of individual monitoring services of Ghana and Gabon if found necessary. The performance indicators assessed included the zero - ...

Hydro geochemical Characterization of the Rocks of the Accra Plains for a Radioactive Waste Repository

Abstract The geological disposal of radioactive waste in well-engineered repositories in stable geological formations has been internationally accepted as a suitable option. The disposal system makes use of both man-made and natural barriers to contain and isolation the radionuclides. Precambrian crystalline rocks are regarded as one of the favorable host rocks for a radioactive waste repository. Hydro geochemical characterization of the rocks of the Accra Plains, located in the south easter...

Evaluation of Safety Parameters for Gharr-1 After Nineteen (19) Years of Operation

ABSTRACT Evaluation of safety parameters of GHARR-1 after nineteen years of operation was performed and are presented herein. This work serves as an input into periodic evaluations of safety parameters. Due to fuel depletion, the excess reactivity for GHARR1 drops to the allowed lower limit of 2.3 mk from 4 mk in about 2 years. Beryllium is added to the top shim tray of the core to compensate for reactivity loss. The addition of beryllium to the top of the core requires evaluations of safety ...

Comparative Study of Energy Dispersive X-ray Spectrum Deconvolution: PyMCA and WinAxil

ABSTRACT A comparative study of spectrum deconvolution and quantitative analysis between PyMCA & WinAxil has been undertaken. Standard spectra of X-ray Kα lines (Ti, Fe, Co, Ni, Cu, Zn, As, Sr & Y) & Lα lines (Ce, Sm, Dy, Ta, W, Hg & U) were fitted with both software; also spectra of three soil samples were fitted with both software. Intensities of the elements of the standard spectra were obtained from the results of the fitting using both software and comparisons were made separately for ...

Assessment of Levels of Occupational Exposure to Extremely Low Frequency Electric and Magnetic Fields in Data Centres in Greater Accra Region-Ghana.

ABSTRACT Data centres use a lot of power, consumed by two main usages: power required to run the actual equipment and power required to cool the equipment. Usage of electricity results in the production of electric and magnetic fields (EMF). Even though electricity is useful in human lives, there have been reported cases of adverse health effects from EMF generated from its use. Because the use of electricity is ubiquitous and plays a vital role in society’s economy, the possibility of harm...

Nuclear Force

It is well established that the forces between nucleons are transmitted by mesons. According to the meson theory, the quantitative explanation of the nuclear forces was extremely tentative and incomplete. But this theory presents a valuable point of view. It is fairly certain now that the nucleons within nuclear matter are in a state made rather different from their free condition by the proximity of other nucleons .Charge independence of nuclear forces demand the existence of neutral meson a...

Studies of Essential and Non-Essential Elements in Cereal Based Weaning Foods for Infants Commercially Available on the Ghanaian Market

ABSTRACT Cereal-based weaning foods, which abound on the Ghanaian market, are nutritionally vital in the growth and development of infants. Recent reports in scientific literature however indicate that rice and other cereals used in the manufacture of the weaning foods contribute significantly to the intake of arsenic (As), cadmium (Cd) and lead (Pb) by infants. In view of this, frequent monitoring of the cereal-based weaning foods has become imperative. The study assessed the beneficia...

A Theoretical Study Of The Production Of Technetium-99m ( 99mtc) Using A Cyclotron

ABSTRACT A theoretical study of the production of Technetium-99m (99mTc) using a cyclotron has been conducted. A nuclear reaction model code (Talys code) was used to generate reaction cross sections as functions of particle energies for 100Mo (p, 2n)99mTc reaction channel which would lead to the direct production of 99mTc. Excitation function for the desired reaction channel for the production of 99mTc and excitation functions for the reaction channels of competing products (contam...

Assessment Of Radiological Doses Associated With Natural Radioactivity From Soil In The Communities Close To Uranium Mines In Namibia

ABSTRACT Primordial radionuclides are ubiquitous in the environment and they exist in different ranges of concentration levels in minerals. Some human activities such as uranium mining can result in a rise of concentration of naturally occurring radioactive materials (NORM) and lead to exposure conditions. This necessitates a need to radiologically map and determine the extent of exposure of people who work in the mines and communities that live nearby as they can be the primary exposed...

Assessment Of Naturally Occurring Radioactive Materials And Trace Elements In Playgrounds Of Selected Basic Schools In The Ga East Municipal District, Accra, Ghana

ABSTRACT The 235U, 232Th series and natural 40K are the main source of natural radioactivity in soil and have long half-lives up to 1010 years. Therefore their presence in soils and rocks is simply considered as permanent. Also due to rapid urbanization, most of Basic School playgrounds in Accra are built close to major roads or industrial areas for which they are subject to many potential pollution sources, including vehicle exhaust and industrial emissions.. A study has been carried o...

Using Ultrasonic Testing in Determining the Degree of Symmetry of a Steel Slab

AbstractThis work aims and explaining scientifically that Non- destructive testing plays an important role in the quality control of a product. It is used during all the stages of manufacturing of the products. It decreases the cost of the product by reducing scrap and conserving materials, labor and energy. NDT is used for detecting the leakage in pipelines for oil and natural gas, oil tankers, aero planes, aero space, measuring the thickness of steel and allo...

Use Of Gamma Rays In The Medical Field

Table of ContentsContentPagePrefaceiDedicationiiAcknowledgementsiiiTable Of ContentsivChapter One: Research plan1Introduction1Problem of The Research1Importance of The Research1Objectives of The Research1Content ofThe Research2Chapter Two: Ionizing Radiation3Definition3Types of Ionizing Radiation3Penetration of Ionizing Radiation6Physical Effects7Uses10Background Radiation10Radiation Exposure10Occupational Exposure11Public Exposure11Chapter Three: Gamma Ray13History of Discovery13Sources of G...

An Evaluation Of The Natural Radioactivity In The Soils Of Okahandja And Karibib, Namibia

ABSTRACTThe natural radioactivity and associated hazards in the soils of the towns of Karibib and Okahandja have been studied by gamma spectroscopy. Each town was divided into ten geographical areas and five soil samples were collected across each area. These samples were processed and placed in well-labelled 500 ml plastic bottles. A High Purity Germanium detector (HPGe) was used to measure the gamma ray spectra of the samples. The intensities of selected gamma lines were used to calculate t...

Assessment Of Natural Radioactivity In The Soils Of The Ohorongo Cement Plant And The Town Of Otavi, Namibia

ABSTRACTThe activity concentrations of the naturally occurring radionuclides 238U, 232Th, and40K in soil samples collected from the Ohorongo Cement plant and the town of Otavi,Namibia have been determined using a High-Purity Germanium (HPGe) detector. Inaddition, an assessment of the radiological hazards due to these natural radionuclidesin the soils of the plant and town was carried out. The plant was divided into threegeographical areas, and fifty soil samples were collected across the area...

Resting Behaviour of Endophilic Anopheline Vectors in Three Ecological Zones of Southern Ghana and its Implications for the use of Entomopathogenic Fungi

ABSTRACTThe aim of this study was to determine the resting behaviour and factors thatinfluence the choice of resting sites by endophilic anopheline mosquitoes in southernGhana. The study was carried out in six villages across three ecological zones ofsouthern Ghana, including: the forest ecological zone (FEZ), the coastal savannahecological zone (CSEZ) and the forest-transition ecological zone (FTEZ). For everymosquito collected, the indoor resting sites was characterised and microclimate at ...


1 - 15 Of 65 Results