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Showing 1 to 13 of 13 for “"HPGe Detector"”.
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Neutron activation analysis of plantinum converter and furnace mattes using a D-T sealed tube neutron generator
… Gamma-ray spectra were measured using an HPGe detector. A number of isotopes were identified in the measured spectra and the elemental concentrations calculated. Radiometric spectral measurements were also made of the samples, without prior irradiation, and the spectra analysed for …
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Doppler-Broadening of Light Nuclei Gamma-Ray Spectra
… and the 12C gamma ray spectra collected using an HPGe detector positioned at four different angles with respect to the neutron beam; near 00, 450, 900 and 1350. No other experimental parameter was changed. The resultant gamma ray spectra indicated Doppler broadening had occurred.</p>
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Assessment of natural radioactivity in the soils of the Ohorongo Cement plant and the town of Otavi, Namibia
… been determined using a High-Purity Germanium (HPGe) detector. In addition, an assessment of the radiological hazards due to these natural radionuclides in the soils of the plant and town was carried out. The plant was divided into three geographical areas, and fifty soil samples were collected …
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Efficiency calibration of a gamma-ray detector for measuring environmental radiation
… using a low-background Hyper Pure Germanium (HPGe) detector system. A critical aspect of such measurements involves calibrating the detector about energy and detection efficiency. The present study details experiment that were carried to determine both energy and efficiency calibrations for …
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An Experimental re-evaluation of Photon Mass Attenuation Coefficients
… were made using a High Purity Germanium (HPGe) detector allowing for increased resolution beyond traditional techniques. Four sources were used (\Ba, \Eu, \Cs, \Am) producing multiple photons of interest over the range of 40 keV to 1.4 MeV, allowed for simultaneous collection of data and a …
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Critical assessment of the MEDUSA gamma ray detection system for radon flux measurement on a tailings dam
… 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, to critically …
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In-situ gamma-ray mapping of environmental radioactivity at Ithemba Labs and associated risk assessment
… /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) for y-ray …
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Development of a gamma ray telescope for online synovial dosimetry in boron neutron capture synovectomy
… and an optimum position for the photon detector was determined. Collimator and detector shields were designed, and significant reduction of neutron flux and background count at the detector location was observed. Sufficient boron photon counts from the synovium were predicted, and the …
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Characterization of the Neutron Irradiation System for use in the Low-Dose-Rate Irradiation Facility at Sandia National Laboratories
… the neutron spectra. A high purity germanium (HPGe) detector was used to characterize the photon spectrum. The experimentally measured spectra and the MCNP results compared well. Once the MCNP model was validated to an adequate level of confidence, parametric analyses was performed on the model …
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Optimization of detector response simulations for multiple particles created by neutron-induced reactions
… system, and studies the optimization of detector response simulations for multiple particles created by neutron-induced reactions. Neutron Activation Analysis (NAA) method was used to investigate the influence of the trace element, chlorine, in the biological system of the human body using …
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Natural radioactivity in soils of the Walvis Bay - Henties Bay coastal area, Namibia
… using a well-shielded high-purity germanium (HPGe) detector. The average concentration for 238U varies from a minimum of 14.5 ± 2.5 Bq kg-1 in Walvis Bay to a maximum of 104.1 ± 28.1 Bq kg-1 in Wlotzkasbaken, with a mean of 52.6 ± 24.5 Bq kg-1 for the six towns. Also, the average concentration …
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Radionuclide concentrations and radiation hazard assessment in the soil of Otjiwarongo, Namibia
… mL polythene bottle and sealed for four weeks. HPGe detector was subsequently used to obtain gamma ray spectra of the samples. The intensities of selected gamma lines were used to determine the activity concentrations of the primordial radionuclides 238U, 232Th, and 40K in the soil samples. The …
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Measurement of neutron flux spectra in a Tungsten Benchmark by neutron foil activation method
The nuclear design of fusion devices such as ITER (International Thermonuclear Experimental Reactor), which is an experimental fusion reactor based on the "tokamak" concept, rely on the results of neutron physical calculations. These depend on the knowledge of the neutron and photon flux …