Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"Multi-element detector"”.
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Uv-Visible Microscope Spectrophotometric Polarization And Dichroism With Increased Discrimination Power In Forensic Analysis
… and sample and then is detected by a photometer detector (photomultiplier tube) to systems in which broad-band (white light) illumination falls incident upon a sample followed by a non-scanning grating spectrometer equipped with a solid-state multi-element detector. Most of these small modern …
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Critical assessment of the MEDUSA gamma ray detection system for radon flux measurement on a tailings dam
… from the mine tailings dam. The system is called Multi Element Detector for Underwater Sediment Activity (MEDUSA). Initially, this technique was uniquely designed to measure the radioactivity on the sea floor where it proved to be successful. The major focus of this research study was, therefore, …
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In-situ gamma-ray mapping of environmental radioactivity at Ithemba Labs and associated risk assessment
… on the /Themba LABS (/TL) site. The ERL's Multi-Element-Detector-for-Underwater-Sediment-Activity (MEDUSA) and high-purity germanium (HPGe) detector systems were used to make in-situ and ex-situ measurements, respectively. MEDUSA consists of a CsI(Na) crystal (length 15 cm, diameter 7 cm) …
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In-situ measurements and calculation of radon gas concentration and exhalation from a tailings mine dump
… low-background Hyper Pure Germanium (HPGe) -ray detector available at the Environmental Radioactivity Laboratory (ERL), iThemba LABS, Western Cape Province. The weighted average activity concentrations in the soils samples were Bq.kg-1, Bq.kg-1 and Bq.kg-1 for 238U, 40K and 232Th, respectively. 1 …
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Development of x-ray holography methods for structure determination : Application of high speed detectors and novel numerical methods
… data are also reviewed. An overview of the detectors relevant to X-ray measurements is also presented. An experimental apparatus for rapid acquisition of X-ray holographs using novel X-ray detectors has been developed. The integration of high speed detectors and the utilization of rapid …