PHYSICS AND ELECTRONICS TOPICS

ABSTRACT

Activity concentrations of radionuclides in rocks and minerals are of vital importance in geosciences and health physics especially that primordial radionuclides constitute the main source of radiation exposure risks externally in soil, rocks and minerals. In this study, samples of four (4) economic minerals, namely dolomite, feldspar, limestone and calcite, were collected from quarry sites in Igarra area, Edo State, Nigeria and analysed using gamma ray spectrometric techni...

ABSTRACT

Aeromagnetic data was analysed and used to delineate the structural features of the upper part of Nasarawa State of Nigeria which consists of Kuje, Keffi and Akwanga. These structural features include: lineaments, faults and folds which are channels for the accumulation of solid minerals. In delineating these structural features, some enhancement techniques such as horizontal derivatives, first vertical derivative and analytical signal were employed. Concentration maps were...

ABSTRACT

Both Airborne Magnetic and Radiometric dataset were employed to interpret the geology and geological structures that serve as host to gold and other solid minerals within the Bida (Sheet 184) and Zungeru (sheet 163). An area of 55 by 110 km square is contained within the cretaceous sediments of Bida Basin and the meta-sediments of ZungeruSarkin-Pawa schist belt. Data interpretation adopted concentrated on mapping geological structures, boundaries and possible gold mineralis...

ABSTRACT

This study details the bioaccumulation of natural radionuclides in rice and sweet potatoes samples acquired from selected farmlands of Kebbi State. Ten (10) samples of rice and five (5) samples of sweet potatoes were collected from (15) different farmlands in Kebbi State and analyzed by means of Gamma-rays spectroscopy using Nal(Tl) detector. Activity concentration for 238U,232Thand40K, in soil sample from the rice farms ranged from, 10.19±0.5-19.56±1.98, 13.5...

ABSTRACT

This research was aimed towards the assessment of geothermal potential part of Borno Basin north-east Nigeria using aeromagnetic and aeroradiometric data. Regional/Residual separation was performed on the total magnetic intensity map using polynomial fitting, and the residual map was divided into nine spectral blocks of which the log of spectral energies were plotted against frequency. Centroid depth and depth to top boundary obtained was used to estimate the Curie point de...

ABSTRACT

The Mineral and Geothermal Potentials of part of Kogi State was investigated through the interpretation of aeromagnetic and radiometric data of the study area. Vertical and horizontal derivatives, Analytical Signal, CET, Euler deconvolution and Spectral depth analysis were used for the interpretation of the aeromagnetic data while the Concentration, Ratio and Ternary images of the three radiogenic elements were used for the interpretation of the radiometric data. The analys...

ABSTRACT

This study focuses on the application of gravity data in determination of the distance between the earth surface and moho (crustal thickness) and stability of parts of southern Nigeria. Empirical relations, Spectral analysis and 2-D gravity modelling techniques were utilised on the bouguer gravity data covering the study area. Three empirical relations relating bouguer gravity with crustal thickness were used to calculate the crustal thicknesses within the study area, the d...

ABSTRACT

This study concerned itself with effective physics practical in secondary schools. It examined whether the way practical experiences were presented to the students and students’ engagement in them enhanced the attainment of goals of practical work. The procedure of conducting practical work in physics was of great concern and more specifically, the skills emphasised during practical work in physics lessons.

The study was conducted in Sokoto...

BACKGROUND OF THE STUDY

The Council Recommendation of 12 July 1999 (2) on the limiting of exposure of the general public to electromagnetic fields (0 Hz to 300 GHz) establishes the fundamental limitations and reference values for exposure to electromagnetic fields for the general population (EMFs). These recommendations were produced by the International Commission on Non-Ionizing Radiation Protection (ICNIRP), and they served as the basis for the e...

ABSTRACT:- Harmful background radiation in our environment has been identified as one of the primary causes of various ailments such as cancer and tumors in our society today. These Higher radiation levels are emitted from igneous rocks such as granite rocks and soil formed from the weathering of these rocks as well as Radon gas in the atmosphere while lower radiation levels are usually associated with sedimentary rocks. This research project is aimed at the...