J. Fletcher

Publications50
h-index8
Citations203
Highly Influential Citations10
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Measurement and analysis of radiofrequency radiations from some mobile phone base stations in Ghana.
A survey of the radiofrequency electromagnetic radiation at public access points in the vicinity of 50 cellular phone base stations has been carried out. The primary objective was to measure and… Expand
Levels of electric field strength within the immediate vicinity of FM radio stations in Accra, Ghana.
Heightened awareness of the ever-expanding use of radiofrequency (RF) techniques and technology has led to mounting concerns from the general public and the scientific community regarding the… Expand
Assessment of radiofrequency radiation within the vicinity of some GSM base stations in Ghana.
A radiofrequency (RF) electromagnetic radiation safety survey had been carried out at public access points in 46 towns with 76 Global Systems for Mobile communication cell sites in two major cities… Expand
Neutron flux distribution in the irradiation channels of Am–Be neutron source irradiation facility
Abstract Monte Carlo (MCNP-5) simulations of the neutron fluxes were performed to determine the radial and axial neutron fluxes of the two irradiation sites of the 20 Ci 241 Am–Be neutron irradiation… Expand
Ground deposition assessment of radionuclides following a hypothetical release from Ghana Research Reactor-1 (GHARR-1) using atmospheric dispersion model
Abstract With the sustained development in computer technology, the possibilities of code capabilities have been enlarged substantially. Advanced safety evaluations and design optimizations that were… Expand
Neutron flux determination in irradiation sites of an Am-Be neutron source at NNRI
Abstract Neutron flux measurements and flux distribution parameters for two irradiation sites of an Am–Be neutron source irradiator were measured by using gold (Au), zirconium (Zr) and aluminum (Al)… Expand
Determination of some essential elements in solanum torvum using neutron activation analysis
Neutron activation analysis for Dy, Hf, Rb, Sc and Se in some Ghanaian cereals and vegetables using short-lived nuclides and Compton suppression spectrometry.
A pseudo-cyclic instrumental neutron activation analysis (PCINAA) method has been developed to determine selected elements in various types of cereal and vegetable from Ghana using relatively… Expand
Quality Assurance and Quality Control of Equipment in Diagnostic Radiology Practice-The Ghanaian Experience
The World Health Organization (WHO) defines a quality assurance (QA) programme in diagnostic radiology as an organized effort by the staff operating a facility to ensure that the diagnostic images… Expand
PAEDIATRIC NECK MULTIDETECTOR COMPUTED TOMOGRAPHY: THE EFFECT OF BISMUTH SHIELDING ON THYROID DOSE AND IMAGE QUALITY
This study investigated the effect of bismuth shielding on thyroid dose and image quality in paediatric neck multidetector computed tomography (MDCT) performed with fixed tube current (FTC) and… Expand
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