Research articles (Dept of Physics): Recent submissions
Now showing items 41-60 of 85
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Effect of annealing on the structural, optical and electrical properties of ITO films by RF sputtering under low vacuum level
(Elsevier Ltd, 2008)Indium tin oxide (ITO) thin films were prepared by RF sputtering of ceramic ITO target in pure argon atmosphere at a high base pressure of 3 10 4mbar without substrate heating and oxygen admittance. The use of pure argon ... -
Effect of annealing on the structural, optical and electrical properties of ITO films by RF sputtering under low vacuum level
(Elsevier Science Ltd. http://www.elsevier.com/locate/mejo, 2008)Indium tin oxide (ITO) thin films were prepared by RF sputtering of ceramic ITO target in pure argon atmosphere at a high base pressure of 3×10−4 mbar without substrate heating and oxygen admittance. The use of pure argon ... -
Optical properties of amorphous Sb2Se3:Sn films
(Taylor & Francis, 2010)The measurements and analysis of optical transmission and far-infrared (IR) reflectivity spectra of thermally evaporated Sb2Se3:Sn films are reported. The refractive index and film thickness have been determined from ... -
Effect of composition on optical constants of Pb: GeSbTechalcogenide thin films
(2008)Optical properties of Pb doped ternary Ge-Sb-Te chalcognide films prepared by thermal evaporation have been studied in the visible and near-infrared spectral regions. The straightforward analysis proposed by Swanepoel has ... -
Nanoindentation measurements of the mechanical properties of polycrystalline Au and Ag thin films on silicon substrates: Effects of grain size and film thickness
(Elsevier, 2006)This paper presents the results of nanoindentation experimental studies of the contact-induced deformation in Au and Ag thin films. The paper examines the effects of film thickness and substrate deformation restraint on ... -
Thermal annealing dependence of some physical propertiesof Bi-substituted Sn–Sb–Se glassy thin films
(EDP Sciences, 2009)Bulk glasses of the Sn10Sb20−xBixSe70 (0 x 8) system were prepared by the conventional melt quenching technique. Thin films were prepared by the thermal evaporation technique on glass substrates. Appearance of some ... -
Phase segregation in Pb:GeSbTe chalcogenide system
(EDP Sciences, 2008)Effect of Pb substitution on the amorphous-crystalline transformation temperature, optical band gap and crystalline structure of Ge2Sb2Te5 has been studied. In Pb:GeSbTe chalcogenide films prepared by thermal evaporation, ... -
Natural radioactivity in the soil samples of Botswana
(Elsevier, www.elsevier.com/locate/radmeas, 2008)Studies on concentrations of primordial radionuclides in soil samples of Botswana were carried out. Measurements were made by gamma spectrometry employing a 41% relative efficiency HPGe detector. The activity of 226Ra ... -
Comprehensive experimental and theoretical investigation of solar radiation conditions in Botswana: A semi-desert region
(Regional Energy Resources Information Center (RERIC) Asian Institute of Technology. http://www.rericjournal.ait.ac.th/index.php/reric/index, 2005-12)Please refer to the attached article for the ABSTRACT. Due to technical problems with some scientific formulae it was not possible to upload the abstract HERE. -
Magnetic measurements as a proxy for car pollution in Gaborone
(BOSHASTED, 2000)Emissions of vehicles represent a significant contribution to environmental pollution along roads. Pollutants from cars include gases such as (NOx, CO, CO2), solid components such as sort particles from exhaust system, ... -
Influence of weak and strong donor groups on the fluorescence parameters and the intersystem crossing rate constant
(Elsevier Science Ltd. www.elsevier.com/locate/saa, 2003)Please refer to the attached article for an ABSTRACT. The abstract was not uploaded here due to formula appearance problem in UBRISA. -
The influence of the Tbetta level upon fluorescence and laser properties of aromatic compounds
(Elsevier Science Ltd http:www.elsevier.com/locate/saa, 2003)Please refer to the attached article for an ABSTRACT. The abstract was not uploaded here due to formula appearance problem in UBRISA. -
Photonics and photochemical stability of aromatic molecules, family related in -structure but different in planarity, rigidity and molecule symmetry
(Elsevier Science Ltd. www.elsevier.com/locate/jphotochem, 2008)Intramolecular processes and fluorescence properties of 32 specially chosen aromatic molecules, different in degrees of planarity and rigidity, but family related in -structure are experimentally and theoretically (using ... -
The influence of the Tbetta level upon fluorescence and laser properties of aromatic compounds
(Elsevier Science Ltd. www.elsevier.com/locate/saa, 2004)The fluorescence and laser properties of seven specially chosen aromatic compounds are studied at 293 ◦C. The quantum yield of fluorescence, γ, decay times, τf , of the deaerated and non-deaerated solutions are measured. ... -
Magnetic hysteresis properties of interacting and noninteracting micron-sized magnetite produced by electron beam lithography
(AGU and the Geochemical Society. http://www.agu.org/journals/gc/index.shtml, 2006)The magnetic hysteresis properties for well-defined micron-sized magnetite samples produced by electron beam lithography (EBL) are presented. In addition to measuring standard hysteresis parameters, first-order reversal ... -
Understanding Nickel Thin Film crystallization using X-Ray Diffractometry
(Bioline International. http://www.ajol.info/journal_index.php?jid=90, 2007-06)Normal, helical and zigzag deposited Ni films were produced by letting a vapour stream of source material impinge on Corning 1737 glass substrates at oblique incidence while rotating the substrate during deposition. Films ... -
Low-temperature magnetic properties of magnetite
(American Geophysical Union. http://www.agu.org/journals/jd/, 200)Although several studies have recommended removal of secondary components of magnetic remanence by zero-field cycling from room temperature to a temperature much lower than the low temperature transition for magnetite ... -
Aeromagnetic and Landsat TM structural interpretation for identifying regional groundwater exploration targets, south-central Zimbabwe Craton
(Elsevier Science Ltd. www.elsevier.com/locate/jappgeo, 2008)Aeromagnetic (AM) and Landsat Thematic Mapper (TM) data from the south-central Zimbabwe Craton have been processed for the purpose of regional structural mapping and thereby to develop strategic models for groundwater ... -
Determination of magnetite grain-size using the Hopkinson effect - examples from Botswana rocks
(Botswana Geoscientists Association, 2001)The Hopkinson effect is the increase of magnetic susceptibility with temperature from near room temperature to near the Curie point. Although this effect has been known for more than a century, it has not been effectively ... -
Fault-Plane Solutions of the 18 May 2001 earthquake in South Africa near Botswana border
(Botswana Geoscientists Association, 2005-12)Fault-plane solutions of an earthquake can provide information about the type of fault. We report on the calculation of the fault-plane solutions of the earthquake that occurred on the morning of 18 May 2001 and was felt ...